What is the best thing to remove algae from an outdoor pond? Also I'm afraid my fish aren't eating, I give them floating pellets but throw them hard to make sure they see them, but they never come and get them? Should I try a different kind of food? My cats were little brats tonight and kept trying to go fishing. One fell in, but came right back for more. Curiousity killed the cat, so they better straighten up.