I have not gotten a pleco yet.....Just looking to get something to help keep the algae growth down. Is an 12" pleco large enough to be safe with Peacocks?
Large plecos really don't "keep algae growth down" (except for the smaller ancistrus and otocinclus, but which may become "feeders" for your peacock bass). Your Mango or Royal will need to be fed separately. Alas, maybe the best bet is a scrubber for the algae.