I BBBed my hot tub , but it won't stay

[waterbear]

what it does say about Cya is:
" cyanuric acid, which is used to reduce chlorine loss as a result of ultraviolet light exposure, is not recommended for indoor pools or hot tubs and is prohibited in two states ; adding this chemical reduces the antimicrobial capacity of free chlorine. "

Precisely, CYA is NOT recommeded for use in indoor pools and hot tubs. Indoor pools and hot tubs are problematic for a number of reasons. And if my understanding is correct of the states that ban CYA in commercial pools that they do allow variences on that and that pools that do not use CYA must use ORP controllers and feed systems to maintain the chlorine levels. I was only aware of upstate NY requiring this. I would be intersted in what other state has passed this restriction. The main thurst of this article just indicated the need for GOOD water testing and maintenace on a regular basis and an understanding of what is involved....just like we all promote, practice, and teach here in this forum!

[RavenNS]

side note:
I would be interested in finding out if Canada has also recommended not using CYA in indoor or public pools.
also, the states that have banned this chemical; was there any basis for this other than reducing chlorine effectiveness ? ( other problematic health factors associated with this chemical ?)