Got my first 0 ammonia, 0 nitrite and 15nitrate reading after dosing ammonia. Dosed again to double check prior to adding fish, both ammonia and nitrites were zero but nitrates were around 30. Did a 20% water change with a bucket that’s treated with prime and has been sitting for about a week. Checked everything today and 0 ammonia, 0 nitrites, 10 nitrates, and Ph -6. My Ph has consistently been at 7 in the tank so I got concerned with the drop. Check my tap and it’s 7.4. Checked the bucket and it’s -6. Anyone else have the same issues with sitting water? What do I do now? I got crushed coral coming to hopefully save my cycle?