I have 6 plants 10 days into bloom going in a 120 gallon rdwc system I have been using the Heisenburg method for a month. However, my plants were so big to begin with that I could not do the sterilizing that is recommended. My roots are all brown and the last two times I have added the tea I get white foam just like I get when I make my 15 gallons of tea. Has anyone experienced the foam after adding the tea to their res? Any advice on what I should do would be highly appreciated!