I am currently running 4 plants in 4 separate bubble buckets. The problem is my roots are starting to get brown but i don't see any sing of slime. they stay at about 72 degrees and have plenty of oxygen in them. I am currently using FloraNova Grow, and if you have eve used FloraNova you would know it is very thick. I think this thickness of my nutrients is causing my roots to get stained by it. Has anyone else experienced this or have any suggestions as to what it might be. Thank you.