Can anyone recommend a decent skimmer for a 20L I do about a 20% W/C every week and water parameters are great. Nitrates usually run between 10-15 though. I have mosty softies and a couple LPS. I am getting some acro frags and I want to do all I can for water quality. I have a current nano skimmer. Bad choice but I was swindled when I was green. I am not looking to spend a fortune since I am planning for another tank. I use an Aquaclear HOB with just the sponge and carbon. Water is crystal clear but I am wondering if I should be skimming.