Hi, I’ve been keeping a Red Sea 350 litre G2 for about a year now. I’ve been using the Red Sea skimmer that’s recommended to come with it. I didn’t know very much when I begun this journey or else I wouldn’t have bought it knowing the terrible credibility they have. My skimmed worked fine for the first 6 months, but now EVERYTIME i do any maintenance with my tank (water changes, ect) my skimmer stops bubbling. I take it out usually, soak it in vinegar and take it apart if I have to, this resolves the issues until the next water change. Thing basically only works when you first get it working, then don’t touch it or change anything in its environment even a bit. I’m over it. Was wondering what protein skimmer is the best as I just want to upgrade to something that’s simply amazing and everyone agrees on being the best or ones of the best! Please let me know, thank you! And if you know which size of it will fit in my sump and save me some measuring I’d REALLY appreciate it as my sump is the one that comes with the Red Sea 350 g2+ kit. Thank you !