just checked the pool and no chlorine

[pettinej]

I live in Syracuse NY and almost every year I open the my in ground L shaped pool it is a green mess. This year I decided to check it early before the mess starts. I checked it today here are my numbers.

FC 0
CC 0
TC 0
PH 7.4
Alk 40
CYA less than 20.

When I closed the pool the CYA was 40 and chlorine was at shock levels. The pool is still clear right now and I am wondering what to do next. My thought is to bring the CYA up then bring the chlorine levels up to shock levels. I have a small submersible pump that I could drop in to circulate the water because I don't want to open it yet.

[swimdaddy]

If you are not going to open it yet and your pool is covered (ie- protected from sun, which uses up chlorine and that is why you need the CYA), don't worry about the CYA and just add chlorine using liquid bleach. Circulating would be a good idea if you are not going to remove the cover. Your other numbers look great though.

[pettinej]

Thanks for the reply. My cover is a safety cover which does let some light through so I thought I would bring the CYA back up to my normal level of 40. If it is no harm I am going to do that and add some chlorine.

[swimdaddy]

Good plan, but make sure you get your chlorine up first. You could take care of both with dichlor, 1 lb of dichlor adds 6.6 PPM of FC and 6 PPM CYA in 10,000 gallons. However, you need to be circulating pretty well since it is granular, predissolving would be a must.

[BorisMD]

How about putting a floater in filled with Chlorine pucks?

[FormerBromineUser]

You could try that if you have them on hand. Maybe just a couple of them, though. I would use some liquid chlorine/bleach NOW, though. Target about 4-5 ppm