NOOOOOOOOOOO!!!!!!!!!!!!!! Chinese algae eaters are one of the worst fish availbale to keep a tank clean, they can kill other fish and once they taste flakes, meaty foods, the cease to eat algae.
I would get 2 BN plecs and thats not affect the bio-load at all if you have a decent filter. With only 4 fish it'll be a peice of cake. BN plecs are messy in that they poo a lot and leave it everywere. Its very long and strong. Holds on to plants and ornaments. But it'll decay anyway, but with a good filter its no problem.