Hello all, I'm new to the hobby of having African cichlids, it's been about three weeks now.I have a 55 gallon tank. I was wondering my fish tend to act freaky at times by rubbing themselves on their ornaments or their rocks. They also at times tend to shake real erratically, why is this? could you help a newcomer to the hobby of raising Cichlids. I've been told is parasites, could this be true. I've brought a chemical for it but it doesn't seem to work.