Yes its possible it will harm them as I stated before but so far it could care less. The farowela sit next to it all the time and it pretends there not there. Yes I know how large they can become but when does a species routinely reach its max size it does in the wild in captivity. Inarguably not often. Additionally how many fish even in the wild reach the maximum size for a species? Again not often. From most od the reports I have heard of people keeping them they near closer to 24" more realistically. If this was a fish that would get 24"+ and was active I wouldnt have kept it but its a pleco. My adonis sits in one of three positions through out the day and moves around the glass at night hes not a high energy/ movement fish
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