Thanks for your reply,

Sorry, i left out some info. Realized it after posted, but was moderated still so couldn't edit.

OK was using dichlor shock. NOT USING ANY MORE. Stopped about 3 weeks ago. and went to plain %6 bleach. Still have some trichlor tabs in floater. Been testing 3 times a day and adjusting to keep levels around 15-20.

Using stay rite cartridge 100sq ft. Do i need to be more specific, if so i will go look and get more info.