Algae Eater For Coldwater Tank

[Kizz]

Well i've set up a coldwater tank it's a just a little 3 foot clearseal that sit's on top of my fridge it currently has a small goldfish and a small fantail these will be getting rehomed into my partner's 6 footer when the time comes lol . The one thing that's annoying me is the algae having to clean every 2-3 day's which is really abnormal for my tanks . Is there any form of algae eater that will live in colder water . It's temp normally sits about 21-22oC can anyone think of anything suitable

 

[snowflake311]

Some one already asked this. The best one would be a rubber nose pleco they like cool but also they need some water movement and lots of O2.