Kind of a general question so I thought I'd put it here. I've got 11 Neolamprologus leleupi fry in a 20 gallon long tank. The only spare filter I have is for up to 75 gallons but I don't run it all the time. And of corse I have heat and air. I'd say they are about 3 weeks old now. I am getting a big algae problem. I do about a 25% water change once a week and use a gravel vac. After the gravel vac the tank looks good but I guess the algae covered rocks are just being turned up side down so the algae is pointing down. I thought about getting a small algae eater but then I won't have anything to do with it when it gets big since it won't work anymore next time we have fry. I also thought about removing the fry and throwing my 8 inch pleco in there. lol. I doubt that would be good either. Any suggestions?