“The Oase Biomaster range of canister filters are, in my opinion, the best filters out there for tanks under 300 litres (although they've just released the 850). They aren't the cheapest out there, but the Termo add-on is so good to have the heater out of the tank. I'd recommend replacing the foams and plastic balls with some better media, but it holds so much bio media which is really nice. This is my second 600 and I have the 350 and a 250. They are great filters. :)”
