Thought I had with ro

That is a good idea but you would need to get the pressure up to 60psi and I think it would put a lot of strain on the pump you would also need a auto shut of valve to turn the pump on and off if the pressure went above 80psi

It's is a good idea to run like a loop RO tank water RO tank water RO tank water

Let us know how you get on


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Fish can't survive long in pure RO water.

Ro filters produce about a gallon of waste water per gallon of filtered water (some more). You would need a heavy drip on your tank just to combat the waste water.

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frnchjeep said:

Ro filters produce about a gallon of waste water per gallon of filtered water. You would need a heavy drip on your tank just to combat the waste water.

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Good point I didn't think of that you would have lots of waste water so the tank would empty as the waste would need to go to the drain


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gorak said:

I forgot about the waste water. Might have to put some more thought into this.

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I run a 50/50 RO mix with my drip

50% hma water
50% pure RO

It works great


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I don't let the waste water. ( they need a better term for this ) go to down the drain

My tank would get 75% ro/di and 25% membrane rejected water. The other rejected water would go into my CA tanks ...

I figure outside of gh and minerals too large to pass through the membrane. The tap water went through a sediment stage and two carbon blocks ( designed to break up the chloramine and trap heavy metals) .

Rejected water was far better than my tap for reconstituting ro/di ..

Btw if your RO is producing clean r/o at a 1:1 ratio ? How is it set up as the avg is 1:4 ... 1 gal ro to 4 gals rejected water ..


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Mr Pleco said:

I don't let the waste water. ( they need a better term for this ) go to down the drain

My tank would get 75% ro/di and 25% membrane rejected water. The other rejected water would go into my CA tanks ...

I figure outside of gh and minerals too large to pass through the membrane. The tap water went through a sediment stage and two carbon blocks ( designed to break up the chloramine and trap heavy metals) .

Rejected water was far better than my tap for reconstituting ro/di ..

Btw if your RO is producing clean r/o at a 1:1 ratio ? How is it set up as the avg is 1:4 ... 1 gal ro to 4 gals rejected water ..


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I run 2 x 150gal per day membraines this way you get more good water and less drain water

The waste from the first membraine feeds the 2nd membraine

With normal RO setup you get 4gal of drain water to every 1gal of good water
With the 2 membraines you get one for one

I also don't bother with di as the resin gets killed fast as I run a booster pump which shuts down for 1/2 hour then on for 1.5 hours when the pump turns on you get a high reading of tds 35ppm for the first few mins

The tds out of my RO is 4 and don't need to get it to 0 that's why I don't worry about resin

I put about 400 gal per day into my tank

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