I looked under the tub enclosure and saw all the gates were open, some jets are super powerful. out of the 4 seats, 1 and 2 are great, 3 works but only at half power but the 4th seat doesnt work at all , what am I doing worng???
Oh some of the jets around the sides dont work either.
Thanks

do you have a rather large jet with a knurled ring around it? If so, try turning that, and see if you can now control the other jets with it.