Hello, Sorry, I've been posting quite a bit lately, but I'm just wondering; I heard that people put goldfish in their water tanks to keep out the mosquito larvae etc., but I have a problem with Algae growing in my water tank. Have you heard of putting a couple of pleco fish in a horse water trough? Is it safe? If so, then do you have to feed the fish or do they just survive on algae? Do they have a lot of waste? I think it would be like drinking from a lake/river, right? Just wondering, because if it did help, I might try it this summer. Thank you.