NB...er

I have had a cedar tub for 11 months now. I use bromine. For the first 9 months I had a hard time keeping bromine in it...always seemed to be 0.5 to 1 ppm when tested....but everything worked well. I took the tub down for a few weeks to do a few things and when started it up I got a second floater and am keeping bromine at like 3....but now I have a chemical odor. But back to the purpose of the post....when I add granules and don't brush them well they were settling on the bottom and were creating the white pulpy material you all speak of. So when hottub was down I sanded the bottom with 120 grit on a random orbit sander. And then applied two coats of total boats penetrating epoxy. It keeps the original look but seals wood and seems to be chemically resistant.

I try and keep bromine tablets in 2 floaters. If it's used by more than one person I add a scoup of bromine after. I weekly add some non chlorine oxidizer....that's it I built it myself....picture attached... I am looking for things that are different as it worked without smell for 9 months. Lately I have been keeping bromine levels where they should be...3ppm. And before I barely kept 1.....it was difficult to.....maybe it's a bromine smell I also had a hard time keeping pH correct but that has balanced. It seems when the wood was new it threw everything for loop

Hey everyone. In New Brunswick Canada here. Have a 6 foot 700+ gallon cedar hottub. Use bromine.tablets in floaters....add some bromine granular from time to time....all going reasonable. I have had slime. Lately have been keeping it at bay. But current problem is a sour smell. Came out of nowhere. Did a purge cleaning..changed water....still there.