We have one of the little Intex SWG (Pre-copper) that has worked great in the past, but this year seems something might be wrong. It has been running for about a week from 12-24 hours a day - green light has been on indicating it is producing chlorine. The problem comes when testing the levels - they basically don't exist. The little chlorine/ph combo one is pretty much clear and using the test with the TF100 the water doesn't really even turn pink until I rinse out the tube (nasty to think about).
So is there a way to tell if this thing is actually producing anything? I thought I remember before that it made bubbles. I know at one point there was chlorine since the combo test was bright yellow, but that was before adding CYA to the pool and it has been very hot so I'm unsure if it just hasn't been able to keep up. I do have a spare unit, but since it is the less efficient copper model I'd hate to use that.