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Water changes question
There's a slight diffence in pH between my tank water and my tap water. Tap water pH = 7.8, Tank water pH = 8.5 . I assume the difference of pH is caused by the lava rock in the tank (correct me if I'm wrong).
My question is what will happen when I do my weekly water changes? Will the difference in pH be enough to have a bad effect on the fish? I'll probably be changing 25% of the water weekly so my guess is that the fish shouldn't feel the difference. But if it will hurt the fish, is there any thing I can do to the replacement water to increase the pH before I pour it into the tank?
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