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Old 07-30-2011, 02:14 AM   #1
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Water

I have a reef tank for 6 years. Always used DI water. Only problem I had is that some of my SPS want grow < die after some time> It is like 50-50. You think it might be because DI not RODI? I know there might be many reasons but it could this too...
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Old 07-30-2011, 02:27 AM   #2
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What's your lighting and stocking? I've heard that you should have fish with your SPS coral because they eat the fish waste.
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Old 07-30-2011, 09:15 AM   #3
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Old 07-30-2011, 09:34 AM   #4
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Do you have a phosphate test? If you have even a little, it may hinder growth and even kill Sps coral. If you do, then you should probably start using ro/di water. You should actually start using it anyways.
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Old 07-30-2011, 10:47 AM   #5
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How often do you change the DI resin? It will deplete very fast if "bad" water is being processed thru it. Once it's depleted it will leech the contaminants back into the water.
What are your water parameters?
Do you dose anything?
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Old 07-30-2011, 10:35 PM   #6
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Why would you use only DI? How?
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Old 07-31-2011, 12:38 AM   #7
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What you mean how? I have DI 3 stage filter. The diffrence is - no waste water. I checked Phosfate in water in my old DI. It is 0 as after RODI. I just wish it is still ok to use DI. In my new RODI in 15 hours I made 25 gal It takes 15 min. DI filter to make 25 gal. I purchased every couple months sediment filter from menards to take worst staff firs. Have that DI filter for 3 years. Did not change DI yet. Make around 3.000 gal. It is made from one of local LFS stores.
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Old 07-31-2011, 12:41 AM   #8
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Originally Posted by ccCapt View Post
How often do you change the DI resin? It will deplete very fast if "bad" water is being processed thru it. Once it's depleted it will leech the contaminants back into the water.
What are your water parameters?
Do you dose anything?
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Old 07-31-2011, 08:49 AM   #9
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Yeah, I was wondering how you had it set up so that it was only DI. I think capt was asking the PPM of the water going into the DI, not the tank water.

You measured phosphates, what is the phosphates of the tap water. And what is the PPM of the water after the DI, not just thephosphates. I am quite skeptical that your DI made 0 PPM water after 3000 gallons. Most don't last 6 months with RO water. If it did, you have no reason to add RO, and save the water.
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Old 07-31-2011, 09:43 AM   #10
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Have that DI filter for 3 years. Did not change DI yet. Make around 3.000 gal
That's a problem for sure. And no way does the resin last 3 years.
Do you have a TDS meter? If so, what does it read on the "good" water?
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