I have a giant fish tank and a hose that drains into the sink, the sink will NOT drain anymore. I've tried Drano, vinegar, one of those hooks that pulls hair out and I still can't get it to drain. I don't know how good bleach is on pipes... I'm thinking it's probably Algae growing in the pipes from draining the tank. If anyone has advice that would be great cause I don't want to have to call someone to come out and take my pipes apart!!!