I have a 90-gallon tank with one of these Featherfin Squeakers currently inhabiting it with other upper tank-dwelling fish. I've tried introducing over 6 common pleco now to their detriment, yet one small clown pleco and a Spotted Raphael have escaped being mauled since I started the tank. I have plenty of cover for the plecos to hide in, and have even tried to rearrange the decor and plants to distract the Syno when introducing a new pleco, but no luck so far. Any ideas on how to safely introduce some good algae-eaters? Syno's too lazy to clean the glass along the front, sides, and back of the tank.