Firstly I apologise if I've posted in the wrong area, I can't seem to find a section on Aquariums (i.e. the actual glass tank). We're thinking of purchasing a second tank and I've been looking at various sizes of nano tanks (up to 55l). Can anyone tell me if the smaller nano tanks (ie the 15l Flex Mini Scape set or the Dennerle 30l nano cube) are harder work at keeping algae at bay as opposed to a larger 55l Dennerel Scapers tank please? I am thinking of making it my first Co2 injection tank (with the Tropica co2 system nano) and would love to try a simple, beginners Iwagumi.