Auto Fill 50 Gallon RO/DI W Auto Top Off to Display Tank

Clubbinaz

New member
Just wanted to update as to the status of my AUTO TOP OFF 150G Mixed Reef Tank. I wanted to get a auto top off system and large water self-refilling storage system in place for my display tank to always have RO/DI water on hand and get rid of the 15 gallon fresh water reservoir underneath my display tank.

PARTS USED FOR BUILD​

Water Barrel : $100.00 Delivered
Click Here To See Product

Spectrapure 90 GPD Max Cap Ro/DI System : $279.99
Click Here To See Product

Spectrapure Dual float Solenoid Valve Controller : $164.99
Click Here To See Product

Spectrapure Ultra Precise Level Controller II : $199.99
Click To See Product

1/4" tubing from Ace Hardware 100 Feet: $40.00

1" Spade Bit From Ace Hardware

TOTAL COST OF BUILD: $800.00 +-
In the end this large up front cost is totally squashed when you take into consideration your labor associated with a years worth of refilling your resorvoir under your tank.


I have finally decided to move forward and design a simple water fill that doesn't require me to run a line from under a sink into my 15G fresh water reservoir every 3 days.

I started with a 50 Gallon food grade plastic barrel with breather lid from Baytec containers. These UN rated plastic barrels are safe for water storage and won't leach any chemicals into the water which is key for this set.

I needed a way to fill my barrel so I picked up a 90GPD RO/DI Max Cap system with new 99 percent rejection membrane from Spectrapure and hooked it up under my bar sink in the same room as my display tank.

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From there I ran the line through the wall and into a closet in the same room where I can keep my 50 gallon water barrel.

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Now that line runs to a dual float auto fill from Spectrapure which I then installed the high and low float. The nice thing about this top off system is that the RO/DI doesn't refill the water barrel until the level reaches the low float switch to keep the unit from constantly topping off and will greatly extend the life of my RO/DI cartridges.

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This solenoid turns on when the water reaches the low float and shuts off when the water hits the high float. *Note: The state of the solenoid is inherently in the off position which will reduce the chance of an overfill. It takes power to open the solenoid. You can also see that I ran two water fill lines through the attic to the display sump. I only currently use 1 of the two lines but it seemed silly not to run an extra just in case.

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To move the water from the RO/DI barrel to the display sump I chose to use the Spectrapure Ultra Precise Level Control peristaltic pump. I wired up the pressure based level control and emergency stop sensor in my 30 gallon sump.

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After leaving the attic and entering the wall I fished the line out of the wall up high by the lighting as you can see in this picture.

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Now that it's running I have a constant self re-filling supply of fresh RO/DI water and plenty of water available all the time for water changes with a precise control top off system running straight into my sump from the barrel across the large living room.

Pretty Cool...

Darren
 
Looks like a pretty nice setup. The native off position solenoid is pretty cool.

Why would many short runs be worse for the RO/DI media vs fewer longer runs? Seems like it would be the same amount of contaminates and contact time regardless of how it is scheduled.

That ATO looks pretty neat. What made you choose it over say a Tunze Osmolator at the same price point or one of the other cheaper models?
 
Im no water wiz, but the way it was explained to me was TDS Creep occurs when the water sits in the cartridge during the initial off phase from the fill before. According to Spectrapure, if you have it turn on and off continuously you are taking the stale TDS infested water and literally dosing your 4th and 5th DI cartridge. It kills the life of those two cartridges.
 
Looks like a pretty nice setup. The native off position solenoid is pretty cool.

That ATO looks pretty neat. What made you choose it over say a Tunze Osmolator at the same price point or one of the other cheaper models?

I needed something that had enough power to literally suck from the other room. I am not pumping into my sump from the 50 gallon fresh water container, Im sucking it from under the stand. That pump is able to pull the water up the 9 foot ceiling, across and down again. Very potent and is the only reason why I picked that pump.

Also because of it's design, it doesn't allow a siphon or vacumn to occur...
 
seems a bit pricey for me... here is my setup:

i had this RO unit already:
http://www.amazon.com/iSpring-RCB4T...F8&qid=1391801832&sr=8-1&keywords=ispring+400

then using an arduino and 1/4 solenoid with a ultra sonic range finder for water level. i dont use a water storage tank since this RO unit can handle 400gpd. check out my thread here for more info: http://www.reefcentral.com/forums/showthread.php?t=2347695

parts list:
https://www.sparkfun.com/products/11061
http://www.amazon.com/Electric-Sole...8&qid=1391801922&sr=8-1&keywords=1/4+solenoid
http://yourduino.com/sunshop2/index.php?l=product_detail&p=115
 
Interesting, I thought the TDS creep was happening due to the introduction of all the particulates in the air and such outside of the unit. Seems like there wouldn't be anything to come in contact with between the carbon blocks and the membrane/DI stages. I'm certainly no water wiz either, but maybe we can get someone who is to chime in and explain it in a way my addled brain can process.

I've got my RO unit and 100 gallon barrel, but they're not hooked up yet. I can't decide what I want to do for an ATO. Been looking at the Tunze units, or maybe just biting the bullet and going straight to a controller solution.

What is the expected life on the little rubber hose in the dosing pump?
 
Interesting, I thought the TDS creep was happening due to the introduction of all the particulates in the air and such outside of the unit. Seems like there wouldn't be anything to come in contact with between the carbon blocks and the membrane/DI stages. I'm certainly no water wiz either, but maybe we can get someone who is to chime in and explain it in a way my addled brain can process.

I've got my RO unit and 100 gallon barrel, but they're not hooked up yet. I can't decide what I want to do for an ATO. Been looking at the Tunze units, or maybe just biting the bullet and going straight to a controller solution.

What is the expected life on the little rubber hose in the dosing pump?

Tunze pump can't handle the height of my ceiling and that's why I went the route with the specrapure top off.

My friend who told me about this solution says that his pump died before the hose did and that occured because he flooded the pump with salt water after 3 years of constant use.

I've got a message to Charles, the owner of spectrapure. Im guessing he can answer the question about TDS creep.
 
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