I know the Remora in the thread is sold, but Remora is an outstanding skimmer. I had the Remora pro on my 72gal and 30 gal sump for about 3.5 years. I should have never replaced it but upgraded to a larger skimmer since I started to have nutrient issues as a result of having an over stocked tank. I later solved the Nitrate and Phosphate issue and in reflection, could have easily stayed with the Remora. Good luck