We have fish profiles, the Chinese Algae Eater is included, click on the shaded name to see the profile with photos. Profiles in general are under the second tab from the left in the blue bar across the top of the page. If the CAE isn't what you have, check the profiles under catfish and Cyprinids, as any "algae eater" is likely to be within one of these.
One important point we all learn, is never buy a fish that will be when full grown too large for the tank you now have. Along the way trouble will ensue, believe me. Always research a fish and know its requirements, traits, behaviours, etc. before acquiring it. Most of us have learned this the wrong/hard way, so don't feel bad about that.
This is a scientific hobby, and the enclosed bit of nature we have in any aquarium has a lot to it.