this is the 2nd time this skimmer is not working sick of taking it apart its only 4 months old you think you buy a quaility product and turns not out to be . i am so discusted in this skimmer, wish i never bought it 500 dollers waisted i refuse to keep taking it down may and then it only to work a few days . the bad thing is is that you are without a skimmer in the process, i had to go out and purchase another skimmer definatly not a tunze this time my wave box i had since august was sent into for service 2 times allready yes they fix it but then inconvience of sending it waiting for it to come back is not worth it as i see on here there are more problems with tunze products then are people that are happy with them.never never again maybe ill post a u tube video of blowing the thing up just for the satisfaction f it look around people before you jump into buying products beacause ther are many many good ones, and bad also i got aa bad one for sure