I use gravel and I rinsed it. And my tap water ph is around 7.8-8.4. My tank has 5-15 wisper filter, 10-30 heater, and I also have a airstone in the tank. I have a 5 in 1 test strips it kinda sucks I think hard to compare colors sometimes. And today my nitrate 20-40, nitrite 1.0-3.0, total...