HotSpring ACE and FW Cartridge
The OEM cell is gone. The Scepter is your heavy duty, factory-built replacement salt cell.
We keep getting contacted about a replacement for the Hot Spring/Caldera Freshwater cartridges. Last year we were experimenting with a couple of customers but found it a cumbersome process and put it on the back burner. Well I just got contacted again and decided to get serious about it. I noticed there are a bunch of knock offs out there that appear to be as crappy as the cheap ACE replacement cells. I just ordered this Caldera Reunion Spa with the Freshwater Salt System so we can develop a good option. It should be here in 6 weeks and a solution should be available in 2-3 months. I will have to say goodby to our Bullfrog STIL5. It’s fully loaded if you are looking for a good, 4 person tub.
With a 4 month lifespan on the Freshwater cartridge, there is a lot of stuff to throw away every 4 months so we want to make the cartridge rebuildable and make something that will last at least 1 year. This should make the cost of operation much less. Please save your worn out cartridges as we want to buy them.


The OEM cell is gone. The Scepter is your heavy duty, factory-built replacement salt cell.
ControlOMatic closed. We still offer parts, heavy duty salt cells, and repair help.
Tired of itchy skin? Convert to saltwater. We'll help you choose the right system for your tub.
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