Ever since I moved my cichlids into a bigger tank they have become scaredy cats and wouldn't come out of their caves, so I decided to get some dithers and today I put 3 apollo sharks in with them. The sharks are nearly fully grown (about 6-7" each) and it's worked a treat. Curiousity got the better of the cichlids and they all turned out to check out the new inhabitants. Right now they're all swimming around checking out each other. The sharks have only been in the tank for half an hour but there's definitely a difference. I can actually see my fishies now