Flow rate / Turnover for 360 gallon display

nsamouroux

New member
I'm in the research stage of setting up a 360 gallon reef tank (96"L x 36"w x 24"h") that I've already purchased and want to get some feedback on the sort of water flow I should be targeting for a mixed reef. With my current 100-gallon setup I've focused on total turnover and tried to minimize dead spots, but I believe it may be more important with a larget aquarium to focus on getting as much flow to various areas as possible rather than total turnover. Does the following plan sound reasonable, or will some changes need to be made?

Drainage to the sump will consist of two internal overflow boxes with two 1.5" sch 80 bulkheads per overflow for safety and redundancy. I'm planning on setting up these drain pipes as a hybrid of the Herbie / BeanAnimal style. All four 1.5" drain lines will enter a 150 or so gallon sump in the basement which will contain skimmer, macro-algae area, and other misc equipment. I was planning on a Barracuda or Hammerhead return pump (due to the 10' or so vertical run) bringing sump water back up from the basement to two 1" returns at the top of the tank that will be split into two 3/4" loclines per return.

The closed loop system is where I'm running into the main dilemma: I hate the look of powerheads or other internal equipment in the display, so the closed loop will provide nearly the entire amount of the display's water flow. For a tank this size, should I go nuts and get two Hammerhead pumps running four returns each with either eductors or locline jets, or would it be adequate to use something along the lines of dual Dart or Barracuda pumps for the closed loop? I'm concerned that if I go and put two Hammerhead pumps on the closed loop that even with four split returns (two locline ports from each of the four bulkheads) I'll end up blowing away the majority of my soft corals, livestock, etc. On the other hand, if I use smaller Dart or Barracuda pumps, will I have enough water flow to keep various SPS corals happy?

This tank will have a sand substrate since I don't like the looks of bare-bottom setups , so I'll be placing my closed loop returns at the bottom of the tank pointing upwards towards the rockwork and sides / top of the tank to minimize the risk of blowing sand everywhere (moreso than the Mural goby does anyways :rolleye1: ). I've been working with Sketchup to diagram and plan everything out, but wanted to use the experience of other large reef tank owners as a sounding board before I make any permanent plans.

Thanks in advance!

Nathan
 
This might be a bit better than a written description to visualize what I'm plotting here...

- The two holes in each of the overflows will be for drainage to the sump in the basement.
- The two holes in the top rear corner of each side of the tank will be the sump returns.
- The two holes on either side of each overflow will be the input pipes (with large strainers) for each closed loop pump - Two input drains per pump for redundancy and to lessen the suction of each.
- The eight holes throughout the front / middle of the tank will be the closed loop returns: four returns for each pump. These will most likely be split into a "Y" after each bulkhead to put in dual locline nozzles for each return to further split up and direct the water flow where I want it. Each set of four returns will come from a manifold with individual ball valves so that I can control the water flow to each bulkhead. I may or may not put an OM 4-way on each of these returns, haven't really decided yet...

Sketchup rendering of the top of the tank:

360gReefTOP.jpg


Rendering of the bottom of the tank:

360gReefBOTTOM.jpg
 
The more flow the better seems to be my take on the best setup.

That said consider larger gain size for your sand and only use a SSB in areas of the tank that can be seen.

I am aiming to have high and low flow areas in my current build.
 
Back
Top