we just bought a home with a cal spa hot tub.
it's a couple years old (2004?) and (except for the cover lift) seems to be in pretty good shape

our big problem is that the jets don't stay in.
the smallest ones (~2 in diam) seem to have a tab that keeps them in place,
but the larger ones (4 in +) don't. about 1/2 of the larger ones find there way into the
water shortly after turning on the jets.

so, 2 questions:
1) what's supposed to keep the larger jets in?
2) how do we get the ones that pop out to stay in place?

thx
brian