Chinese algae eaters CAE are the loaches that suck slime coat off goldfish nd other large slow moving fish, not plecs. Once they grow to 3in CAE aren't very good algae eaters either, despite the name.You could put like 1 or 2 octocinclus algae eaters in the tank.

your tank is to small to hold the fish you have got goldfish need 10 gallons each pluss 10 gallons they are very messy fish