Originally Posted by tommaso889
okay i will consider that what would you recommend for a 60 litre (uk) i think that is a 15 us gallons
First, find out what algae you have. Most of the so-called "algae eating" fish don't eat anything but the common green algae. And "green algae" can be brush algae, hair algae or cyanobacteria (not a true algae but it acts like algae), and plecos will not eat any of this. And, plecos get large, the common pleco to 12+ iches which is too big for a 15g tank.
You need to identify the algae and then fix the reason it is there. Did you check the photos in the link Angel gave you? Here's another good source for identifying algae: PG: Algae - An Overview - PlantGeek.net