Change or remove CYA targets for Spa with Bromine?


Well-known member
Oct 16, 2019
The Villages, Florida
I understand that the developer has made a decision to set fixed target levels, and Pool Math does not support bromine.

At a minimum, I would like to have the ability to remove CYA from my spa. CYA does nothing for bromine as far as I know, so having to record the level every time, or leave it at zero makes no sense. I would rather be able to remove it from my spa. Is there a way to do this?

Better yet - have the app support bromine, so CYA would be a target of 0 :)


TFP Expert
Platinum Supporter
May 23, 2015
Tucson, AZ
Well, in all honesty, the app was developed with pools in mind, not hot tubs. A chlorine sanitized hot tub just happens to work with the app’s features. Hot tub maintenance is a small subset of TFP’s user traffic and so it’s never been a high priority .... bromine tubs are an even smaller subset of that.

That said, perhaps @Leebo and @redth can add the request to the future list of upgrades. Winter time is always a good time to mess around with app features.