BTW, I forgot to ask…how much of a rise in pH and KH should I expect to see? I just recently added an air pump with bubbler (in my grow out tank) just to ensure I have enough oxygen in there, because I’m running my temp at 30C/86F. Well, I came down this morning to my pH around 6.8-6.9. Went out and came home late in the evening and my pH was down to 6.2.
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I just put the shells in yesterday so no change due to that yet. The swing happened before that. I was using baking soda. Maybe I just put in too much. After my water change, I didn’t see a change in the pH, so I added more…maybe too much. Anyway. I have the shells in now, stopping the baking soda. I will monitor it closely and see how it goes. Woke up to the pH at 6.5. If I can get it to stabilize there, I’d be ecstatic. Good thing is, the fish don’t seem to be stressing.