Why bother though? You are wasting so much money and playing russian roulette! You'd never know if it is "good or bad" batch.
In my opinion it is pure garbage. I dont care if they say it works or not.
Want to know MarinelandLabs excuse? "You need to have your carbonate hardness higher for it to work properly" And in my opnion that is just B.S. And i dont think a store wants to spend 600 dollars {min order, our price} to buy this crap and not be able to know if it is a good or bad batch.
Just cycle your tanks normally, if you cant wait for a tank to finish the cycle, you obviously have no patience for the hobby. Period.
Angry,
~Mike