I just bought a 120 and I want a in-sump skimmer for it. I have always used a hang on in the past as needed. I was looking in ILC, Aquarium Discount Pet Center, and Dr's Foster and Smith online and they all look alike but the prices range from 200-400. I have heard in the past to avoid Coralife and Sea Clones. What brands should I avoid? Which brands offer the best value?