I think the Angels might take them out, as for the others it's a crap shoot. Not the frogs if they are very small, Surprised the angels don't nip at the frogs sometimes..they are cichlids after all. As for algae, What type of algae is it?? How often do you do water changes? With f/w tanks, water changes are just as important as s/w tanks. A great deterent in algae growth. Where is tank located, near window?? There may be some debate on it but I try not to keep a f/w tank too close to any windows. For now I would try more frequent water changes, Test your water or take it to your LFS and have it tested and don't expect changes overnight. As for algae eaters look for a "Bushynose Pleco" If you really want a pleco, they are the best pleco I have found for algae. I have had several types and for the most part I find pleco's a very dirty fish. They create a lot of waste as well. The other thing about pleco's is once they start eating fish food they don't do a very good job on the algae. You may want to investigate some other options for algae. I have had some good success with snails as well, but you have to be careful if it is a planted tank. There are a few other fish that can help, Chinese algae eaters are ok{Can't remember their proper name} But like in a marine tank you have to be patient, change is usually slow. Good luck and Happy Fishing
