Yea rumples I am a total convert over to the bubbles. I do have a question, However; I don't have a TDS meter, so right now I watch water quality by sight. I have two girls up now, one shows good water quality, the other seems to always have crap(organics)in the water when I check PH and do nute changes. What could be causing this? Also I was wondering if the 10 days for changing nutes is set in stone. Sometimes I feel like I am throwing away good nutes. Thanks dude