High Fin Spotted Pleco

I'm needing to move my high fin spotted pleco from my planted 10gal I've been raising him in, and I'm not sure if he'd be happier in a 55gal Malawi cichlid tank with a common pleco, or if he'd do better in a approx 70gal octagon with goldfish and an albino Bristlenose Pleco. I got him super small and he's needing to move up to one of my bigger tanks. . . those are his two options LOL

Well, the bristlenose has been with a common pleco before and there were no problems. He seems very docile and doesn't come out often, so maybe they wouldn't butt heads too bad. My goldfish tank runs a bit warmer than most, so I'm not worried too much with the cold water. Maybe I'll try there first and see how he does. In a few months when it warms up, hopefully the goldies will move out to a above ground pond anyway. . . I am having a super bad algae problem though in my 55gal. Is it too horrible to add a second common to that tank to help clean up the mess? I know two wouldn't be ok together once they got huge, but re-homing if necessary wouldn't be too big of a problem later down the road.