Thank you kindly for the information!  Historically, for the pool, I’ve simply used the CuLator 1.0 packet in my skimmer basket with good results.  I did try the CuLator 4.0 inside the GatorCage as an upgrade/replacement, but it did not seem to perform much differently.  Not complaining, but if the 1.0 is working, it would be simpler for me to just continue that routine.

As far as actual movement and lifespan, continuously using on of the CuLator packets has kept my copper levels fairly steady at 0.1 ppm.  Sometimes 0.0 and sometimes 0.2, but very flat.  I was north of 1.0 and going higher when I started using them just under 2 years ago when we bought the pool.  Previous owner did not unfortunately manage the water chemicals very well – pH way out of spec, ridiculously high chlorine and CYA, plus he added algaecide doses every week…

Everything is now in much better shape, but I think there is some damage to either the heater and/or copper pool pipes (underground) allowing them to leech copper still.  However, I do think it is getting better (reduced)!   Actually planning running for several weeks later this summer when I have a bit more free time without the CuLator to see how fast the levels are rising, but assume there will still be a need long term for the CuLator.

Thank you again!