Hey Ken, adding salt doesn't increase your PPM on your chlorine count. Salt doesn't get "ate up" nor does it "burn up" from the sun. The only time you need to add salt is water splashing and loosing water outside the pool will lower your salt level. What you do need with all this rain is to pour some shock in your pool. Your chlorinator is working overtime with this rain because rain contains acid and acid lowers your chlorine level. Whenever we have a Hugh rain fall here I always add a bag of granular shock mixed in a bucket with the pool water to dissolve it and then I pour it back in the pool. Depending on the size of your pool you can read on the bag how much to add. This shock just gives your chlorinator a boost. Adding more salt will not increase your chlorine level.
Thanks, Judy. I was talking about the salt PPM, not the chlorine PPM. What I meant was that since the salt system decomposes the salt (NaCl) to free the chlorine via electrolysis, at the rate it's set to do so, as it does that the salt gets temporarily used up until the hypochlorous acid gets converted back to salt, and you may have to add more salt periodically to maintain the 3000 PPM. My concern right now is that the pool has gone right up to overflowing with all of the rain... over 4" up in two days... and all of that fresh rainwater dilutes the salt content in the pool water.
I need to shock it as well as soon as the rain stops. I use Leslie's non-chlorine shock, which is 38% Potassium Monopersulfate that chemically breaks the bonds between the chlorine and inorganic elements in the water to make the chlorine available for disinfecting and killing algae.
I am also quite concerned right now because my pump is not even running, and thus the salt system isn't either... the PVC plumbing sprung a leak and the pool guys were SUPPOSED to fix it yesterday - but didn't because of all the bleeping RAIN! I may need to throw some granular chlorine in, until the pump is running again. I have a chlorine floater, but that doesn't really do much good in still water. I just don't want an algae bloom from the rain. Hopefully they will fix it tomorrow... or I will fix it myself!
BTW, it's pouring rain here right now... ARRRRRGH! I may need an ARK soon!
Ken