I have a rather odd question. A few years ago while camping where I live In NY I found some freshwater clams in a clear water stream. I put these in my heated Amphibian tank that was half water- half land. They seemed to thrive in this deplorable mucky water despite the clear fast moving water I found them in. Fish wouldn't even survive in this water. I believe they were a species that were brought here from Asia on accident. If I were to find these again, how would they fair in an african cichlid tank. Also Would they add to the bioload? or reduce it by being a living filter?