RO unit question

[polarbear]

My brother recently asked me if a RO unit that he got for free from a job site would work as an RO unit for his fish tank. I didnt know the answer so I told him I would ask on here to see if anyone knew. It is a Culligan Aqua-Clear RO unit. It has the following filters:

Stage1: five micron sediment filter
Stage2: Reverse Osmosis Membrane
Stage3: Carbon filter

I told him that if this did work we would have to plumb in a DI unit. If this would work would we need to re-due the lines so that the last stage the water goes through is the membrane before going into the DI Resin? Any help would be great.


1972319724

[allan]

other than what you told him, get a TDS meter to verify the output. Not sure that would reflect in the DI aspect though. I can bring my TDS meter to the swap if he wants to check the quality of the water produced.

[Big_Pun]

look up rejection rate on the ro membrane

[Big_Pun]

from what i have read on the manufacture site is that it only has a rejection rate of 87% on TDS, most reef systems are at 97-98% rejection rate. you will burn up resin fast and that will get expensive

[Sherita]

My brother recently asked me if a RO unit that he got for free from a job site would work as an RO unit for his fish tank. I didnt know the answer so I told him I would ask on here to see if anyone knew. It is a Culligan Aqua-Clear RO unit. It has the following filters:

Stage1: five micron sediment filter
Stage2: Reverse Osmosis Membrane
Stage3: Carbon filter

I told him that if this did work we would have to plumb in a DI unit. If this would work would we need to re-due the lines so that the last stage the water goes through is the membrane before going into the DI Resin? Any help would be great.


1972319724

That's kinda bassackwerds. It's normally sediment filter>carbon filter>membrane

And, I would be worried about chloramines with only one carbon stage. Chloramines removal requires 20 minutes of contact with 20" of carbon. Depending on the gph of that system, you may need to add as many as two carbon cartridges to remove the chloramines. Example....mine is a Melevs Reef 100 gpd system. We had to add another housing in order to remove the chloramines (20 minutes of contact with 20" of carbon). So, mine is set up like this: sediment filter>catalytic carbon(refillable)>carbon block>carbon block>membrane>di resin.

In other words, you are going to have to make some changes in order for it to work. It can be done tho, IMHO.

[alton]

Going back and trying to remember my old Culligan Ro system that I got from my helper when I was out inthe field.
phase 1 = carbon/sediment
phase 2 = R/O
Phase 3 = Carbon/ polishing for taste
Systems like that are for a drinking glass or a pitcher at a time. I think mine was like 25 gallons a day? And I might be totally wrong (whats new)
One good thing Sherita brought up was the use of Chloromines by some of the water companies around here. I have to use two of the Chloromine blaster filters (BRS calls it something else) because Green Valley uses Chloromines.

[polarbear]

Thanks for all of the advice. Ill let him know. Thanks.

[BuckeyeHydro]

That system may have a CTA membrane - in which case you WANT the chlorine to reach the membrane.

Russ

[SABOB]

Does anyone know if there is Chloramine in SAWS water?


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[BuckeyeHydro]

No chloramine - just chlorine in SAWS water.

Russ

[SABOB]

Thanks Russ,always available for a quick reply


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