Layout 87 (12 L)

James: I have found it possible to get no algae at all in tanks as small as 3 litres with no filter, no CO2 and no algae eaters.The tank in the photo was 10 weeks old. It was initially planted with plants that were already growing submerged, which I think helped.However, the most important thing, in my opinion, is to change 100% of the water every day just before you switch the lights on. All tanks where I have done this seem to be completely algae free after week 4.Perhaps the combination of stable water conditions, water that is rich in CO2 and O2 and a little chlorine are bad for algae!