The full range of replacement foams for the Oase BioCompact 25 and the 50 internal filters. They provide effective mechanical and biological filtration.
We recommend these should be changed every 6-8 week but cleaned more frequently, remember never to clean the foams in tap water and only waste water form the aquarium.
Easy to replace. You will also need the Oase Carbon Filter Media which is available to buy online at Swell UK