715 Gallon Reef Tank Build (1300 gallon system)

saltwatershark

New member
Hey everyone, I'm starting a new thread on my current reef project that I started planning a couple years ago, but only recently began implementing. Based on a borderline obsessive compulsive set of plans that kept me up for many nights, I decided to start putting those plans in place: I recently pulled the trigger and started the build. Depending on everyone's level of interest, I'll post more information and pics as they arise.

I have experience with saltwater fish keeping generally, but nothing of this magnitude. I got thoroughly hooked on saltwater reef keeping because I have an hour long commute each way to/from work everyday, and I started listening (on YouTube) to American Reef, NY Steelo, Jim Stime LA Fish Guy, Ryan at Bulk Reef Supply, and Dave at Vivid Aquariums. These guys got me hooked!

Anyhow, here are the basics of what I have in process:

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1. 715 Gallon Display Tank (DT). The DT will be on the main floor of my home in the hearth room. This room is connected to my kitchen and is where my family spends the lion's share of time together. I selected this location in consultation with my wife because we want to maximize our family's enjoyment. Other locations were considered but ultimately this place looked best and structurally it is appealing (see discussion below). The DT will be approximately 715 gallons and measure 144" (l) x 31" (w) x 37.5" (h). I have not ordered the DT tank because I want to make more progress on the fish room before ordering the DT, and I have to remove a built in desk and cabinets.

2. Glass Versus Acrylic. I decided on 3/4" starphire glass for the front and sides, and standard grade 3/4" glass for the bottom and back. I want the DT to be as close to "scratch free" as possible, and I want the extra thick glass to make it super strong. I have 3 little kids that love to bang toys on everything so having this thickness should help. The starphire glass, while adding significantly to the overall cost, will make this tank a transparent as possible. I respect acrylic tank people, but if my little kids scratch a tank of this size (and expense) i might go over the edge!

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3. Downstairs Fish Room. Our basement is only partially finished. We live in a small community called Saint Albans which is near Saint Louis, Missouri. Basements are standard to prevent home plumbing from freezing. Directly underneath the hearth room (where the DT will be installed) is an unfinished room that my son calls "Daddy's Workshop." I keep my tools, pool supplies, and now the sump and filtration components here. Water will drain from the DT overflows and empty into the sump downstairs. The sump is a 240 gallon glass tank that has been drilled and fitted with 9 bulkheads (7 are 1" and 2 are 1.5"). I had numerous glass dividers cut to specification, which I will silicone into place upon finalization of the sump design. The sump is connected to two reservoirs, each are 150 gallons. One of the reservoirs will hold RO/DI water for auto top off (ATO) purposes and the other reservoir will hold saltwater for water change purposes. I added a saltwater mixing station that feeds into the saltwater reservoir based on another posting that I have found to be quite inspirational (see "Triple S Fish Ranch" thread which is an amazing thread). I tied the reservoirs into the sump with a Genesis reef ATO and water changing system has been installed. Also connected to the sump is a 29 gallon aquarium that has been drilled and fitted with 3 bulkheads (1" each). This will be an acclimation tank when no fish or corals are obtained, or as a frag growing tank when new fish are not in quarantine. It can be tied into the sump or segregated with the simple turn of a calve. I may add more tank volume downstairs if needed, but for now it'll suffice. The nice thing about having the fish room is that it is expandable based upon needs.

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4. Plumbing. Piping, true union ball valves, gate valves, T's, Wyes, 45's, L's, check valves and other fittings are Schedule 80 PVC for all fittings. Valves are either Cepex true union ball valves (TUBV) or Spears industrial gate valves. They serve different functions but I greatly prefer the
TUBVs because they are much easier to turn. I plan to run the return pipes through the floor in between the walls with only the ends emerging from the wall and tying into the DT bulkheads.


5. Other Filtration. The system includes UV sterilization (150 watt high output smart UV by Emperor Aquatics), ozone generator with air dryer and O3 reactor, carbon reactor, GFO reactor, protein skimmer, and 2-part doser. A refugium will be built into the sump. All reactors and the skimmer are external to the sump to maximize water volume. I have not selected a heater or determined if a chiller will be needed.


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6. Water Pumps. The return pumps are 2 Reeflo hammerhead gold pumps which produce about 3000-3500 gallons per hour (GPH) a piece. In addition there are 2 Reeflo blowhole 840s and 1 Reeflo 1140. Each of these pumps is external and hard plumbed to the sump. I'm also considering a Sicce 2400 GPH submersible pump which will power the acclimation tank. A separate canister filter will be hooked into the acclimation tank but will only run when new fish are quarantined. Upstairs in the DT the Reeflo hammerheads will deliver 6000-7000 GPH through 6 inlets: two will be on oscillating sea swirls, and 4 will alternate through an "oceans motions" current divertor. I'm debating what else is needed but I'm thinking a couple Vortech MP60s with battery backups. Not sure yet about the Vortechs but I've heard they're great.




7. Lighting. I need lights upstairs over the DT and a light over the refugium downstairs. I want everything to be LED based on LED unit size, long term operating cost, and heat production and disbursement. Given the depth of the DT (37") I think LED pendants are needed but I'm not yet sure. I'm leaning towards the ecoxotic 100 watt cannon, the ecoxotic 120 watt cannons, or the orphek 110 watt DIF-XP pendant. I need to conduct more research regarding light dispersal, coverage, color, and PAR levels. The refugium LED can be less precise because all I need it to do is grow macro algae 24/7 as a nutrient export strategy.

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8. Structural Considerations. A 715 gallon aquarium-- 144" (L) x 31" (W) x 37" (H)-- on the first floor of my home begs the question whether the floor cAn hold the weight. With water, rocks and stand, the tank will weigh around 8000-9000 lbs. (or more). That's like parking 2 suburbans in your family room, but stacking them one on top of the other and condensing all of that weight and spreading it accords a much smaller area. The DT will run across 9 floor joists, with the cement foundation wall on one side, an "I-Beam" directly underneath the full length of the aquarium, with one metal upright/floor jack connecting the I-beam to the foundation floor. I'm also adding 4 foot sections to each side of the existing 2x12 floor joists and then running additional floor jacks from a new cross beam down to the foundation. My wife will kill me if I destroy our new home, and she does not want a new staircase to be added Asa result of the tank falling through the floors. Pictures are attached.


There's a whole lot more to discuss and I really hope everyone jumps in and provides their advice and opinion. This forum is loaded with valuable information-- what a great resource!
 
Looks like you're on top of most of the stuff. Two things I would suggest you consider:

1). Your RO/DI top-off tank is rather large. Consider worst case scenario that something gets stuck open and all the water in the top-off tank gets dumped into your system. That's 150 gal into 715 gal, which would have a significant effect on salinity in the DT. Better to get some experience running the tank to see what your average daily evaporation rate is and then size the top-off tank to just something 5% larger.

2). You are using Schd 80 fittings but only Schd 40 pipe. For your return from the basement up to the DT the pipes will be under a lot of pressure. You might want to consider using Schd 80 piping for the return run.

Dave.M
 
SPotter and SABOB, thanks for joining, I hope you enjoy the build!

dave.m, thank you very much for your thoughts. I should have clarified with respect to the piping that it too will be Schedule 80. In one of the pics I think you might see a schedule 40 pipe that holds a few float valves. It doesn't carry water though.

Regarding your ideas on the ATO, you've really got me thinking. I want a large RODI reservoir because I want to use this water for various reasons (e.g., filter cleaning) and also have it "just in case". One other reason is that by the time you purchase one of these tanks, which are not too expensive, you have to pay rather high shipping fees regardless of whether you purchase one or two (or more) tanks. That, coupled with my irrational desire to maintain symmetry led me to purchase two of them.

So, that explains the "why 2 reservoirs" question but it does not really address your comments regarding safety. Your cautionary words are insightful and very much appreciated. There are a few systems here that should prevent the system from over-pumpumping ATO water, which as you correctly point out, would dramatically reduce system salinity.

The safety measures are as follows, but I'm going to give it more thought in light of your advice:

1. The ATO system and water change system are made by Genesis Reef Systems. The RODI reservoir includes a float valve from the RODI system, and then there are 3 additional float valves within the reservoir: (i) at the very bottom, a float vale that will kill power to the pump if the water level drops below it; (ii) in the middle a float vale that triggers the RODI system to turn on once the water drops below the specified level; and (iii) the top float valve powers off the RODI system.

2. The sump section where ATO water is pumped in includes an overflow for excess water to leave the sump and drain into the main plumbing stack.

3. This Genesis system automatically "times out" an ATO pump based on specifications you program.

Some of my pics aren't posting so I posted schematics recommended by Genesis. My system generally follows these recommendations. I haven' filled the system yet but so far I'm impressed by the quality of the Genesis product.

I'm going to think more about the above safety measure in light of your advice because I think there might be more I can do to ensure against unwanted ATO filling. I really appreciate you taking time to give me this advice.

This weekend I'd like to plumb in the George Fisher Wyes (check valves) on the main return pumps, add some loc-line to the acclimation tank, and add soft tubing from the reservoirs to the auto water changing system (which I plan to have remove and replace about 3-5 gallons per day). I'll update this thread later this weekend.

In the meantime, have a great holiday weekend everyone!
 

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Thanks for Joining Mark, I'm glad you're here. A downstairs fish room is good for several reasons:

1. Virtually unlimited space: you are not confined by the area under the tank in a stand.

2. Access to running water and the plumbing stack for draining purposes.

3. Quite system operation: the pumps are downstairs and largely cannot be heard from the display tank.

4. Nice place to hang out: I suspect spending time in the fish room will be more fun than viewing the tank itself!


But with a downstairs fish room there are also some downsides. Nothing that cannot be overcome, but here are a few:

1. Need to reinforce floor above: You really need unfinished basement space directly below the display tank, and no matter how strong your floor may seem, and any large tank (say, over 100 gallons or so) should have reinforced floors. It's pretty easy to do, but it takes time. I had a general contractor look at my situation and also asked a colleague who is a former engineer to give me his best guess. Might check home insurance policies and local building codes too.

2. Pump head pressure: the return pumps have to be pressure rated and must be able to overcome the head pressure of many additional feet. In my case, the pumps could push about 5500-6000 GPH with no head pressure, but given the run I have to overcome due to the downstairs location, these pumps will lose about 2000-2500 GPH due to head pressure, and some more due to plumbing fittings (using 45's as much as possible instead of 90's).

3. Cutting through walls and the floor: your drain lines and return lines have to be run through your floor, and possibly through walls. In my case, I'm going to run the lines through the wall and down through the subfloor, because this way I don't have to damage the oak wood floors. Don't forget, if you ever move to a new home, and the new owners don't want a massive aquarium, you don't want to have to pay for new wood floors to cover up your construction!


My advice to anyone building a tank is try to find a great location for the display tank that you will get to enjoy the tank regularly, and also try to find a space where you can have a downstairs fish room or a room behind the tank (even a coat closet or laundry room) where you can access and service the filtration and have a means for getting water in and out.
 
I loved my fish room in the basement and will miss it dearly in my new home where basements are not a possibility.
 
As I'm in the planning stages of a basement sump/fish room...I'd like to see how you connect to the drain system. Pictures would be great/
 
Do not trust float valves for anything important. I had both low and high water magnetic-type float valves that were supposed to control the top-off pump fail and a third swing-arm type emergency float valve fail as well.

That system (not designed by me but I took it over) was connected directly to the RO/DI. When I came in on the weekend to do maintenance I discovered that all the salt in the system had been flushed down the drain by the RO/DI. Naturally everything in the tank was dead. It was only a standpipe in the sump that lead directly to the sewer that saved the client from a flood.

That was my introduction to float valves in ATO systems - never again!

Now I make a two-layered system on timers: one to fill a SMALL reservoir from the RO/DI and the second to top up the tank from the reservoir for an hour or two a day. That leaves no opportunity for disasters when I'm not there.

Dave.M
 
Do not trust float valves for anything important.

+1... & the check valves are almost guaranteed to fail, also!

IMO any tank over 24-27" tall is a major PITA to maintain...you'd be much happier with a 'wider' (front to back) tank, than 1 so tall.
 
if you cut the hole in the floor the same size as a register vent, no need to fix the floors or walls. plus this will reduce head from the pumps
 
if you cut the hole in the floor the same size as a register vent, no need to fix the floors or walls. plus this will reduce head from the pumps

That is a great idea! I need to cut through some nice 3/4 Brazilian hardwood and was concerned how I would fix it if I moved. Just throw in a vent, even if its just for show...
 
Hello everyone, I've been busy at work this weekend finishing off some PVC fittings, and more importantly, the auto water changing system and auto top off system. The RODI system is working and the first reservoir is full. I'll provide a more detailed write up and respond to your individual comments tomorrow. In the meantime, here are some pics of the systems powered on-- really cool LED lights show the system slowly coming alive! Detailed plumbing explanations and pics are forthcoming.

I'm really floored by how helpful you all have been so far. Thank you!i hope everyone had a nice holiday weekend.

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Hey everyone, apologies for the radio silence but I've been busily assembling the system. I've silicones several customs cut dividers into the sump. I started using wood clamps to hold the dividers in place:

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This was an awful experience because my glue job was quite sloppy. It works but it's ugly.

Next I completed the plumbing the water changing system. That seems to have worked quite nicely:

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A couple folks asked for pics of the water change metering reservoirs, which you can see here:

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The inside of the reservoirs have float valves that determine how much water has been pumped into the metering reservoir, which tells the system to (1) dump the dirty water (left reservoir) out into the plumbing stack; and 2) to replace the dirty water with clean saltwater (right reservoir):

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I'll provide more updates soon! I'm headed out in a business trip this Friday so I plan to write up more info while on the airplane.

In the meantime, happy reefing!
 
Thank you! One thing I've learned is to go slow, buy high quality (even if that means waiting a really long time), and minimize the amount of maintenance you'll have to perform. This probably applies to more life issues than just reefing! Have a great night.
 
One other thing-- do yourself a big favor and buy Cepex true union ball valves. They are simply the best--- they always turn when you need them, they don't leak, and they don't break:
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Question for you guys: I would appreciate your lighting recommendation for my new tank. It's 144" long, 31" wide, 37" tall. I plan to make it a mixed reef with corals and fish. I would like the tank to have plenty of high quality light and I do not intend to cut corners (i.e., be cheap) when it comes to selecting the lighting. I want to be able to dim the lights and I would like to have some control over lighting color (e.g., dark blue at night, bright daylight in the daytime, etc). I have a Neptune Apex controller.

I'd like your recommendation regarding which and how many lights you recommend, including any suggestions regarding configuration. Currently I'm thinking about the brand new Orphek pendants (apex ready), Ecoxotic 100 watt cannons, or Kessil A360's (apex ready).

Any thoughts on what is the "Ultimate LED"? Thank you for any suggestions!

Also, what do you think about 2-part dosing versus calcium reactors? I like both but to date I'm undecided.
 
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