I like my pleco,s , I have 12" that I move to the jag tank then back to Homers tank to clean the glass and wood. does a great job, but they do need to be fed and they poop allot. long ropy poop. so you need to vacuum well at water change. cichlids do not see them as a territory threat per say? they will nip at them, but being a armored fish this a minor in convenience for them. and they can go on attack if the jags or Oscars piss them off enough.