I've got a hot tub, 425 gallons, bullfrog. New filters that are rinsed weekly and degreased with tsp monthly.
I use the bleach method along with a drop in swg and salt.
I use muratic acid to get TA to about 40-50 and pH is stable at 7.6.
I add CYA to about 30.
After using the hot tub, the swg can easily produce FC to about 6-8 the next day.
Sometimes I add extra 6% bleach if more people have used the tub.
I don't normally use MPS but have a little.
Problem is this, always high CC. After doing chlorine shocks or using MPS, it rarely goes below .5. It is often at about 1, sometimes 1.5. If I shock it heavily with bleach, it drops some. I've left the swg in and running 24/7 for a few days, and the FC is the same as if I superchlorinated it. I open the tub up most every day for an hour. I've drained and cleaned with the ahsome product twice and put new filters in, but the CC always seems to rise to about 1ppm.
I'm comfortable with the methods described here. I am confident they tub does not go below a couple FC. I rinse before and after use.
I must be missing something but I don't know what it is. I've read lot's of forum posts and articles about CC. It was not an issue for a long time, but now my skin reacts to it, somewhat dry and itchy. The few times I've let the swg churn away for a few days without using it, the CC drops to near zero (maybe .2-3). When the FC drops to about 6-8 and I use the tub, it's nice. After an hour there is still FC of about 2, so I assume it is not exhausted and the swg starts to rebuild it after I am out.
Any insight would be appreciated.
I use the bleach method along with a drop in swg and salt.
I use muratic acid to get TA to about 40-50 and pH is stable at 7.6.
I add CYA to about 30.
After using the hot tub, the swg can easily produce FC to about 6-8 the next day.
Sometimes I add extra 6% bleach if more people have used the tub.
I don't normally use MPS but have a little.
Problem is this, always high CC. After doing chlorine shocks or using MPS, it rarely goes below .5. It is often at about 1, sometimes 1.5. If I shock it heavily with bleach, it drops some. I've left the swg in and running 24/7 for a few days, and the FC is the same as if I superchlorinated it. I open the tub up most every day for an hour. I've drained and cleaned with the ahsome product twice and put new filters in, but the CC always seems to rise to about 1ppm.
I'm comfortable with the methods described here. I am confident they tub does not go below a couple FC. I rinse before and after use.
I must be missing something but I don't know what it is. I've read lot's of forum posts and articles about CC. It was not an issue for a long time, but now my skin reacts to it, somewhat dry and itchy. The few times I've let the swg churn away for a few days without using it, the CC drops to near zero (maybe .2-3). When the FC drops to about 6-8 and I use the tub, it's nice. After an hour there is still FC of about 2, so I assume it is not exhausted and the swg starts to rebuild it after I am out.
Any insight would be appreciated.