LisaLQ
Fish Gatherer
A bristlenose will cost you the same as a common roughly when they're little. Personally even if it were a BN, it'd be too big for a 10g as they can get to 5-6". Not just only is the size an issue, but all plecs poo tonnes, so you'd be doing loads of gravel vacs. It's a common misconception that plecs clean up your tank to sparkling new, many dont even eat the algae on your tank, and make twice as much poo - so therefore twice as much work. In a little tank they can make fishkeeping more of a chore than a pleasure
You're better off returning him and getting some other little algae eating fish/creatures (otos, snails, shrimp?).