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I guess my biggest concern really, is the size difference between the two. The Pleco is much bigger than the Shark. I guess I'll try it out and just keep an eye on them. Make sure they play nice with eachother. Lol.
I have personally never seen an aggressive pleco. I had one in a 55g tank with a rainbow shark and they never had issues with each other. The plec was massive almost a foot long.