GTR
Active member
New and interesting situation.
This system has been running CP since April of this year. Twice in that time the system has been bleached. After the bleaching I've never much problem with ammonia and never show nitrite as the system cycles again. I usually isolate the sand filter and ammonia tower unless I'm stopping a major outbreak.
This time the maintenance crew decided to turn on the UV unit and by the time I discovered it the system looked as though it had been treated with Furan-2. Added about 2 gallons of carbon to strip out the color and spent CP. Now 4 days later the system is measuring nitrites in the 1.0 ppm range. The system is running at less than 10% holding capacity so this makes no sense to me.
This system has been running CP since April of this year. Twice in that time the system has been bleached. After the bleaching I've never much problem with ammonia and never show nitrite as the system cycles again. I usually isolate the sand filter and ammonia tower unless I'm stopping a major outbreak.
This time the maintenance crew decided to turn on the UV unit and by the time I discovered it the system looked as though it had been treated with Furan-2. Added about 2 gallons of carbon to strip out the color and spent CP. Now 4 days later the system is measuring nitrites in the 1.0 ppm range. The system is running at less than 10% holding capacity so this makes no sense to me.