06-27-2012, 05:04 PM
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Originally Posted by maxw47
Hey, I just had and idea, although it might get a little expensive. What if I were to take pure RO water, add in trace minerals (I have seen numerous products that are labeled like this). Then, add peat to get a ph just below 7. Would this work? Or should I not add peat and just keep RO with a little bit of trace minerals to get a gh of around four? Thanks!
Totally RO water should have zero or near-zero GH (and KH), and the pH likely just below 7, say mid-6 range. As the tank's biology establishes the pH will lower down to 5 or below if you let it. Which is fine for some fish, not for others. And you will have to add hard minerals for the plants. Some fish would find this too soft too, again depending upon species. As the tap water is free and to hand, it would be easier to mix some in, but you can experiment with this to see the numbers. Additives can get expensive too. I use Equilibrium solely due to plants to provide calcium, magnesium and potassium.