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I recently re-scaped my 10 gal that I have had for years to include live plants. I also started doing regular water changes and watching the aquarium pH. Its a long story but the tank was kinda neglected before a few months ago (partly through ignorance). However, I have a bit of a problem. The pH test kit says my tap water (well water) is at 6.0, the lower limit of the kit. The actual ph may be below 6.0. My aquarium has a pretty stable ph of between 6.8 and 7.2 with the pH generally at around 7.0. How do I do water changes without experiencing a pH swing? I know that a stable pH is super important for the fish (2 black skirt tetras, 2 serpae tetras, and 1 mystery snail). The tetras are a few years old and are the only survivors of a die-off experienced a few years ago. The tank pretty much went into a holding pattern after the die-off. I didn't really want to keep up the maintenance but also didn't know of a good home for the remaining fish. I understand that I need to keep those tetras in larger groups and am looking into adding more of them soon. Fortunately, I haven't seen much aggressive behavior.