Hello, does anyone have any experience with these and or with the dennerle cubes in general? I picked up one of the 20l ones at a bargain price (over half rrp!) and it's got absolutely everything, light, filter, substrates even got a piece of sumatra nano thrown in there for nout and very pleased with my purchase I am indeed. Next question is are they actually any good at growing plants? Namely without co2, I know dennerle show them lushly planted out on the box literature but there's no clue as to if they're with co2 or not or even with the standard lamp? Is anyone running them with a heater or are they fine without? I know the filters are supposedly a bit naff but that's no large concern I've a couple of suitable ones kicking about. Any info from anyone who's set one up and had it running would be greatly received. Gareth.