So im starting to get some algae on the glass, im going to start having the light on less but i would like to add a pleco to help. My temp is constant 79-80. I have my angel, chocolate cichlid, rainbow, green severum, gold gourami, blue acara and a german ram. I had 2 one has gone missing and im really thinking something ate it because i cant find it. Also have the corys. What are my options. The tank is a 125 gallon.