Well, I imagine from your message you are a bit frustrated, but sarcasm really isn't get you anywhere, in fact it will probably discourage folks from replying. Anyway,
Quote:
I don't seem to understand It's plumbing configuration. The air hose isn't connected to a blower of any sort? It completely loops around the tub from one air valve to the other without tying in to a blower?
The air line you refer to is going to an "air control" and does not need a blower, in fact if the spa probably didn't have one originally, properly plumbed spas don't need a blower, the jet bodies venturi draws in air through the air control.
Buy a new filter, appox. 10% of water volume should be sufficient (i.e. 500 gallon spa, 50 square foot filter), and replace the whole equipment system with something like:
http://spapartsnet.com/p_Air-Control-Sp ... 1_2_1.html
Looking at the plumbing you will have to tee off the discharge since you have 2.
Good Luck on your adventure.