Like all the other reviewers have said, AVIOD. I bought the 2000ef+ external filter. First of Al the UV light came broken, which was a easy resolution, I just bought another one. The main problem is the filter leaks. It leakes from the one of the clips. I don't mean just a simple leak, I mean the filter was spraying water like a water pistol. I have contacted all pond solutions and raised ticket after ticked from there support centre. I have sent pictures, I have sent videos but nothing has been done. Like other reviewers have said, all I get is stupid replies asking have I checked the o ring, or the seals or the taps. Even though I have explained many many many times it's leaking from the canister and not any of the seals or taps. It has now been 1 week since my first contact with all pond solutions about the leaking filter and I'm still none the wiser to what they are waiting for. I requested a replacement but no answer, I requested a refund, no answer. All I get is silly messages back with no one actually trying to resolve a faulty filter they sold. Avoid all pond solutions. There products are OK but the after care and service is non existing.