12-19-2012, 01:48 PM
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With respect to the GH/pH issue, we first must consider fish in this tank, and according to your log there is a male betta and a cory. Both of these will be better with softer rather than harder water, so we must choose carefully.
Equilibrium is not the best additive in this situation, because it adds calcium, magnesium, potassium and a couple others mainly for plant assimilation, so there is not that much available to fish and inverts. A better choice would be the additives like Replenish, which is intended more for fish than plants. But bearing in mind the above, what is the GH now?
Adding crushed coral (which is pure calcium) works well, but this will send the pH soaring, and I would not recommend that with these fish.