If you just have to lower the PH RO-ID is the best way to do it... you will still have to do water changes and the water out of my tap is 8.2 but falls to about 7.8 in the tank. So you wont be able to do big water changes. If you lowerit passed 7.0. If you do a big 50% or more water change it will swing the PH and kill the fish. Smaller more often water changes are a pain in the ? . IMO: You just don't need to do all that. I have seen a few dark water tanks end badly.
What Fish are you planning to keep?
What Fish are you planning to keep?
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