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-   -   RO/DI water? (http://www.plantedtank.net/forums/showthread.php?t=199409)

Crow 12-05-2012 12:33 AM

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.

fplata 12-05-2012 12:44 AM

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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jmowbray 12-05-2012 01:54 AM

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.

fplata 12-05-2012 02:14 AM

Quote:

Originally Posted by jmowbray (Post 2099692)
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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Crow 12-05-2012 02:30 AM

So it's best to just use tap water with an dechlorinator?

fplata 12-05-2012 02:38 AM

Yes, or a mixture depending on your tap parameters.


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Crow 12-05-2012 02:41 AM

Surprisingly Detroit city water is some of the best water in the US.

Thanks for the answers.

happi 12-05-2012 03:27 AM

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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