RO/DI water? - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 12-05-2012, 12:33 AM Thread Starter
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RO/DI water?

Hello all,
I have been in the saltwater hobby for 20+ years now, and in the middle of setting up my very first planted freshwater tank.

What I'd like to know is, can I use my water I make from my RO/DI unit in my soon to be planted 90g?

Or will the water be striped of needed items from the ro/di?

My setup is a seven stage ro/di unit, so the output is 100% pure h2o.

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post #2 of 8 (permalink) Old 12-05-2012, 12:44 AM
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You will need to remineralize it, what is your tap water like? In my case I use 70% ro/di 30% well water and that gives me a ph of 7, gh of 5 and kh of 3. Lots of people use tap depending where they are from.


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post #3 of 8 (permalink) Old 12-05-2012, 01:54 AM
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I use 100% Ro for my planted tank. Never had any issues. I used to do 100% RO/DI but got tired of remineralizing it.
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post #4 of 8 (permalink) Old 12-05-2012, 02:14 AM
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Quote:
Originally Posted by jmowbray View Post
I use 100% Ro for my planted tank. Never had any issues. I used to do 100% RO/DI but got tired of remineralizing it.
I am guessing you have a smaller tank with an active substrate. Also dosing EI with gh booster will help, but I guess you will quickly deplete your active substrate. On a large tank you will have issues if you use only ro/di unless you dose gh booster and some sort of k2co3 to increase your kh (clearly this is dependent on the substrate)


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post #5 of 8 (permalink) Old 12-05-2012, 02:30 AM Thread Starter
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So it's best to just use tap water with an dechlorinator?

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post #6 of 8 (permalink) Old 12-05-2012, 02:38 AM
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Yes, or a mixture depending on your tap parameters.


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post #7 of 8 (permalink) Old 12-05-2012, 02:41 AM Thread Starter
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Surprisingly Detroit city water is some of the best water in the US.

Thanks for the answers.

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post #8 of 8 (permalink) Old 12-05-2012, 03:27 AM
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i use 100% RO water, gh 1-2 and Kh 0, plants and fish were happy and healthy, i dosed my own fertilizer on this setup. 1tsp of GH booster during water change.
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