I don't know much about smaller tanks but maybe even if you had a efficent skimmer on the same tank it might only take out the same ammount of skimmate.. or near it. How much sludge can you even take out of a 20 gal tank? Is 1/4 of a cup that bad? I'm just asking.. I've never had a salt tank under 100 gal. I use to use a knop-hang on skimmer on an old FO 115 gal and it wasn't
the best skimmer but with an airstone and venturi mod it worked quite well. Make the best out of what you've got.
IMO, I wouldnt spend the cash on a fancy skimmer for a 20 gal. But if you are having cyno maybe an upgrade is in order?
I've seen seaclones and a lot of how to get them working right is just finding the right settings and tweaking it. I have also seen people add limewood airstones to boost the bubble produciton.
I'm just sitting on the fence on this one
