Algae in stock tanks is a constant problem. It's not a huge time waster to clean, but it would sure be nice if it didn't form in the first place. I have researched treating the water with bleach, but that requires 2-3 oz of household bleach per 50 gal trough, and the transport/handling/measuring and long term expense seems like it would be worse than just cleaning the troughs twice a week. A concentrated powder based product, however, might solve those problems as long as it dissolved and dispersed quickly enough to not harm any livestock that used the trough shortly after treatment. I looked into copper sulfate, but there are some sheep that drink from these troughs, so that is a non starter. The other species that use the troughs are horses, goats, dogs, and donkeys.
Has anyone used pool shock or other pool products successfully for this purpose, or anything else for that matter?