Hey everybody! So I'm cruising along with the TFPC method (really is a piece of cake), keeping FC levels between 4 and 7 (CYA at 45) not letting it go below 3.5. Hardly any CC, the test never turns pink to begin with.
But it smells like a public pool. You know, that heavy chlorine-ish smell. Well, not always, but sometimes. Especially at night, and especially when running the spa. On the other hand, during the daytime, which is when I run the pump for about 7 hours, I don't smell anything and the water's totally clear.
From what I understand, the chlorine smell originates from combined chloramines. If that's been registering 0 on my tests, what could the smell be coming from? For a minute I thought it was ozone from the ozonator, but it doesn't smell like ozone either.
Thanks in advance.