The Garra imberba lives in the benthopelagic, freshwater environment.
You could try some Garra pingi pingi (AKA Garra imberba), which are coldwater algae eaters which should be fine with your fish, but this won't permanently solve the problem. More
Garra imberba on Fish Mapper TSN 689083 (Taxonomic Serial Number) Retrieved on from the Integrated Taxonomic Information System online database. This is a cached copy. More
Gara Pingova in Czech (česky)
Gara Poilaneova in Czech (česky)
Pings Saugbarbe in German (Deutsch)
Suippoimubarbi in Finnish (suomen kieli)
无须墨头鱼 in Mandarin Chinese
無鬚墨頭魚 in Mandarin Chinese