TilthedayI die, is close, the 1st bucket is $125.00 re-orders are only $100.00, and it lasts 90 days, which should be suffucient for one full grow.
(I edited this post to explain further why the difference in price, when you 1st purchase it, it comes with a pump and hose, refills are only the bucket alone.)
As far as answering your question, do you mena during lights out? if so the answers no, do it during the time when the lights are on, and be careful not to get any on your light, that could be dangerous!!! Thats pretty much the reason why I do not foliar feed.
CO2 Boost - All-natural CO2 Generators for the purpose of CO2 enrichment and air fertilzation