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i don't know either, h2o2 turns into h2o after a few days and should be harmless to you plants at the level you're applying it. speak to any dwc grower and they'll tell you high temps are dwc's worst enemy because it creates the perfect temp to breed all those nasties. there are definitely res...

h2o2 3% application rate is 15-30ml/gallon (1-2 tbsp/gallon), so you didn't overdo it with 1tsp/gal. imo, your res temps are a breeding ground for the slime you see, and it is temporarily cured by the h2o2 but will soon reappear if the res temp isn't dropped to the low 70s. res temp is very...

oh! a 4" fan changes things, that should work perfectly with your carbon filter. i thought you had an 8" fan, so a speed controller probably won't work for you because you might not have enough cfm's pulling threw the filter with the reflector with 8" duct holes in between. maybe, you can...

i think he's right too. what cfm is your 8" can fan? there's a 500cfm and a 700cfm version (i can't remember the exact numbers). either way, you're fan is probably too strong for your little 4" filter (probably rated for 200cfm). the speed controller should work. was it 2 months of flowering or...

depends on your medium. if you're using hydroton - your flood cycle should last less than 30 minutes and flood 4 times a day.

if you have some money, buy a temp/humid controller and let it take care of temp/humid all year round. ime, as long as your ambient temps aren't too high, you shouldn't have a problem with humidity. i bought one for my tent, the cheapest is about $200. with a 400w, your temps won't rise that...