DI water - The Planted Tank Forum
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post #1 of 3 (permalink) Old 02-08-2014, 01:50 AM Thread Starter
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DI water

I have had a problem with Diatoms and BGA for over 3 months now. I tested my tap last month and found that I have phosphates off the charts. I tried a few products in my canister filter to help with the phosphates but everything sticks around as I do my weekly water changes. I feed lightly and my tank is full of plants.

I picked up a DI unit from my LFS. They didn't have RO units. I know that the resin will expire quickly because my phosphate levels are so high, but I don't know what else to do. They offer refills. I also bought a TDS meter and it is in the mail.

Correct me if I am wrong, but from what I understand, the water from a DI will come out with a PH of around 7 or a little lower depending on how long it sits, and it will have a KH/GH of 0? This water needs to be reconstituted with the proper minerals for my fish and plants as well as buffered so that I don't have any ph crashes?

Seachem Equilibrium should provide the proper minerals, but what about the buffers? If I am already keeping my tank at a PH of 7 with Neutral Regulator during my weekly water change, will this be sufficient for the DI water as a buffer? Do I need to mix DI/tap over a period of weeks or can I just start using it right away?

Is there anything else I need to consider before using this unit? It was an impulse buy and I wasn't educated. Now I am trying to figure out the best way to make it work for me.

Thanks for any advice.
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post #2 of 3 (permalink) Old 02-08-2014, 02:09 AM
Algae Grower
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I have heard of people using RO and RO/DI machines for shrimp tanks, but never just the DI unit. Sorry, not much much help I know lol hopefully someone more knowledgeable will chime in.
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post #3 of 3 (permalink) Old 02-08-2014, 02:15 AM Thread Starter
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Thanks Cape. Yea, its weird because basically what I have is the single DI resin filter canister. It is only part of what would be a 5 stage rodi unit. As I read more I am wondering if my LFS even knows what they are doing.. because from everything Ive seen, this canister should be part of a whole system.

Anyone used just a DI resin canister or have any thoughts as to how that would work out?
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