I have a 5 gal. bucket I want to keep prepared (ph, nutes, etc). 2 days ago I used pH Down to bring my pH from 8.2 to 6.8. I used about 1 ml/gal. I put an airstone in and loosley put the lid on. 2 days later my water has a weird smell, is cloudy and has white floaties. ph is 8.5