Still here, haven't looked into the ph bottles and slime link. I think I may have brewed a bad batch of tea, the slime didn't change (for good or worse) with the pondzyme and aquasheild in there, but after I added the tea it just exploded!! Did another res change last night and had to take them all out and try to hose all the slime off. Took the wet vac to all the feed and return lines to get everything out of them but it didn't work. After I refilled the system and let it circulate a while I checked on them to take my #'s and gobs of slime where on the roots again!!
It was late (early really) so I just left it and will do it all again tonight.
I wonder if the drain hole is too big and too low to just turn them into hempy's as they sit! Or just drain em and add some soil. I'm about ready to I tell ya!!