Algea on the glass.?

I have 2 medium-large size tanks. The 29 gallon has algea on the glass that is very difficult to remove while the 120 gallon tank tends to get algea that is easy to move.

Are there any kind of plecos or catfish that will help with these algeas?? I here otto catfish are good for it and the algea on the plants.

Thanks for help.