drobbyb
Bowhead
Yes, you want to do a 90% waterchange to get close to your tap's pH again. How are you doing your nitrate test? You have to shake the bottle for 30 seconds to mix the chemicals inside it (I think it's bottle #2) and you must mix the test tube for 60 seconds I think, I don't have the instructions in front of me, and you have to wait 5 minutes for the results to develop.