Hey there,
Hygrozyme is the best. Every ten days. Are your containers black? Too hot? What is the water temp? Voodoo juice is really good for growing monster root systems, but hygrozyme every 10 days makes for nice water. Pirahna and tarntula work well too. If you are using H2O2 throw a couple pennies in the bottom, copper is anti-microbial. Good luck.