I have a new spa now 8-01-2016, the other one (10 months old) is back to the dealer.
I have one issue
The 24 H circulation pump is making noise and bubling.( the older spa did that not)
We have disconect the hose from 1 one-way valve from ozonator (it is in the hose) and i put my vinger on it.
Then the noise and bubles are away.
Ozonator pump bubling - YouTube