Sounds like you need Zandor's 2 new books as I am waiting for them also. I hate for the man to have to spoon feed me. Are you using the UV like a pond or fish thing I've seen to kill stuff or is it just done when the water is RO'ed ? Are you using any Cal-Mag plus ? sounds kind of like the cal-mag. You have to add it back for RO water. Bubblers in buckets, are you keeping the water level just under the net pots ? I used dynagro my first time it did good but go for GH 3 parts when you can. Sounds like your doing things right. What kind of venting are you getting, outside air or what ?