stuff is weak, better off going with zeovit aas much better deal for the amount you have to pay vs dose as i went thru a bottle in two months with no excess signs of algae whereas with the zeovit aa's now i think it will last me more then a year and they work better too, i too found reefbiofuel to be super weak, i've worked my way up to 6ml a day dosing on my 100gal w/o any blooms our side effect, whereas with vodka i'm dosing 0.6mls which is my maintenance dose, huge difference if you ask me. MB7 i'm still using, dosing about 1 ml every 3 days.
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