You can do some simple mods on a SeaClown skimmer that make them ok skimmers (not great) for small tanks, up to 100l I reckon. Uprade the pump to 1200 or 1500lph, dremel off the innermost acrylic tube, put a wooden airstone down the centre of the skimmer. THe original design wasn't great, and these mods won't make it as good as a $500 skimmer, but it might ok for your setup. Good luck with whatever you go with.