guys, first things first, sm90 is meant for a sterile res and can be used in small amount along side h202. it's rare for sm90 to cause slime or root rot so check your environment first and water temps. hydroguard is beneficial so you can't mix that with sm90. regular root excelurator can't be used in hydroponics because the airstones cause it to congeal and block all pipe work and pump however you can use the silver bottle which is specifically for hydroponics.
read the labels properly so as not to mix beanies with sterile chemicals. i have always found sterile hydroponics hard work - think about it - your water is full of bacteria so you're fighting a losing battle - just a few aerobic bacteria can cause the start of slime and root rot. it's a disaster waiting happen in my opinion.
personally i use either fox farm kangaroots or orca to add my beneficials (these are like heisenberg tea), pond sludge cleaner to keep the system crystal clear (once again beneficial bacteria), and api aqua safe. after that i use hydro based A & B, a root stim product (rhizotonic or rhizoblast), seaweed extract like liquid karma to help make the plants more receptive to the nutes and increase uptake, silicon, silicon, a flowering stem, flower booster and a finishing booster. and ph down of course. all the above are symbiotic with each other. i can't remember the last time i used h202 whilst growing or bleach or physan - you just don't need them.
also, my water temps run at 72f. the whole point of above is to keep the bacteria beneficial so the beneficial ones eat the aerobic ones. i flush religiously every 14 days and always leave 5 to 10% of the old water in. running a sterile system means no bacteria - just think about it - how can there be no bacteria?
