I had a new Nature2 cartridge each year for the last 2 years. I removed my spent cartridge at the end of last season and have not purchased a new one yet. I'm just running the pool water through the empty Nature2 housing.
I have been reading about adding borates to my pool, but I am concerned about my previous use of the Nature2. I have read somewhere that the Nature2 adds silver and copper to the water, which are incompatible with borates. Can someone please help me figure out if it's OK to add borates to my pool?
Aquapure SWCG system
Recent test data: