My water comes out of the tap at 7.2. The only thing I add to it before it goes in my tank is dechlorinator. Just regular bagged gravel from Lowe's as the substrate. I rinsed that extremely well before it went in the tank though. Why then in the tank is my water showing 8.8? This is a 10 gallon tank that has been set up for about 4 weeks now. There are some moss balls, a couple dwarf chain swords, 2 java ferns, and 2 dwarf Lilly bulbs. No fish. I do use seachem flourish in the recommended dosage once a week. Im not convinced the tank is cycled though. Ammonia 0 nitrite 0 nitrate 5. I want to eventually add cherry shrimp but at a ph of 8.8 plus I don't think I'll be able to do that.
EDIT: I also use aquarium co op root tabs.