I had added about 2# of stabilizer at he time. OK we finally have someFC this morning. water not clear yet so will continue with the frequent testing and adding.
In retrospect I think fertilizer was the culpret due to the 2" stain on the steps where the water level was when we opened it.
my original CYA was 20 , I added 15 gal bleach and it was gone in 2 hr, that evening I added stabilizer at advice of my local pool store and later added 15# of dichor shock, . next am it registered 0 FC
Have have had my 30K gal inground for 20+ years . this year for first time I can not get any FC reading. Put in 17 gal bleach at 8am all gone by noon. Last night but in 15# granular shock, today FC 0 CC 0 HELP!