I have a 10 gallon tank and its been cool since I got it ph level been normal but recently it dropped to 6.0 and been trying to get it to a constant 7.0 level. I did 50% water change every other day and been at it for almost a month. So far I have my pleco but he's going into a new tank soon with more room but I want to get my ph level back up to 7.0. Any ideas? I used this ph level increaser for a few weeks and I see no ph increase. I also plan to add some fish but first I need to get my ph level to a steady 7.0.