I have no idea where to post this question so . . . What are your best tips for controlling algae in stock tanks & livestock fountains? We used to use carp, which amazingly worked well, but the only place in town we could get them went out of business (naturally). Has anyone used Stock Tank Defense? More importantly, does it actually work? We down-sized from a 600 to a 300 gal stock tank in one of the pastures, mainly because there's a decent pond & the tank was too big for the de icer to effectively work in the winter, plus we only keep avg 8 heifers & a bull in that pasture. Manually cleaning the fountain (Ritchie) at the barn isn't a big deal - but it's not fun. Thoughts? Go!