Perfect Ben Thanks I followed the forums advise and added a 182 oz jug of bleach last night and will test manually tomorrow because that much would be off the chart on my test kit. This morning I brushed not much kicked up the pool is a paler green. The chlorine level was high on the test 5-10 so some stood in the pool. I took out the cartridge as you suggested Ben and it was pretty filthy. I usually keep several cartridges on hand to switch out. I'll do your soaking method too.Now with running without the cartridge would I miss the opportunity to filter the dead algae out? Now just have to locate stabilizer as Amazon couldn't ship for a week and I have zero in the pool. I might have to break down and go to the pool store. Thanks everyone!