Hello I hope I didn't post on the wrong forum I didn’t see a section for UV Sterilizers. I have a 55gal freshwater aquarium and my UV sterilizer called ''Green killing machine'' stopped working correctly after 4 months in the tank.( the red small light went off and it started to get really hot when I tried to unplug it and also at the box where the red light used to be on!!) I am looking to buy something better than that and I know the reviews are saying it's awesome etc. and it gets 4.5 starts out of 5 on Amazon but personally I don't think was doing much else besides dealing with green algae. I am looking for one that doesn't have any in-line hook-ups because I have HoB filters and I don't have more stuff into my tank and I like it simple to just submerge and can kill parasites and algae. I was confused at the fact that there are different flow rates for freshwater and saltwater aquariums? I don't understand. I was looking at this one SunSun CUP-613 13 Watt UV Pump/Filter- $67.99 http:///InternalUVSterilizer.html Does anyone know if it's good or had any experience with it? Can anyone else recommend me a different one?