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So I should switch to a substrates that raises pH to try to stabilize it? I already have 1 piece of driftwood on the tank. I had two for a while but the tannins were a bit stronger than I'd like. No real effect on the pH occurred. The remaining piece has been there for a month or so.

No, but I'm trying to figure it stocking. I have 5 platys and 5 sterbai Corys. I would love to get into some dwarf cichlids, maybe pearl gouramis. I just know I can't have sensitive fish while my pH is moving so much.

Well, according to that chart my CO2 is actually low... So I'm not sure what that means?

I did put some water in a cup and let it gas off for 24 hours, do you think that's not enough time? Right out of the tap my pH is 7.4 and 24 hours later it was still 7.4. Is there a way to test for CO2?

It's Tahitian Moon Sand and it says it doesn't affect pH. Plus, when I had plain old gravel the same thing was happening. I do have mopani drift wood in the tank already, do you know if it affects the water differently than the malaysian drift wood? I thought the mopani was supposed to drop...

I originally had just plain blue gravel but I've switched to black sand (Carib Sea brand). I added driftwood about a month ago. No limestone or crushed coral. The tank has been running over 5 months and has been fluctuating the whole time. The problem is that it isn't stable. As soon as I...

Over a week long period, my pH gradually rises from 7.4 to 8.2. My GH takes about 18-19 drops, my KH takes 6-7 drops. My tap water left out for 24 hours is 7.4. Any ideas on why my pH keeps changing? I'm concerned about whatever fish I add. I'm also cycled.