I have about 50 baby convict cichlids. I got some powdered baby food from a friend, but the stuff dosent sink that fast, and I think the parents get more of the food than the babies do. Im guessing that they are getting some food since they are still alive, probably from the bottom. Also, how long before the parents become a threat to the fry. Also, because there are so many babies, I am unable to clean most of the sand, b/c I dont want to suck up any fry. Will this cause any problems. Thanks.