instantthc;2117433; said:i've had 8 piranhas with a common pleco 2-3" bigger than the piranhas and he picked on them. i'd say get an adonis pleco but he would outgrow the tank fast. they are a pretty agressive pleco though. you could always go to petco and order a 6" pleco for like 20$. you still haven't posted size of cichla so i don't know if this will help u or not. but check your lfs they constantly have large unwanted or overgrown plecos. GL
I am terrible with sizes but my midavil is approximately 6 inches or so and the gold saum is about 5 inches.