After several days of heavy rain what should you do?

Many, many pool owners are concerned that rain drastically affects your pool water chemistry. It doesn't.

Common sense tells us that a pool with an average depth of 48 inches receiving 2 inches of rainfall generally dilutes everything in the pool by around 4%.

So, if your CYA was 50ppm, it's now 48ppm!!

If your FC was 5ppm, it's now 4.8ppm!!

pH can take a more significant hit but it's not gonna' drop or rise precipitously regardless.

The REALLY big exception to this is if you have an inground pool that gets flooded. All bets are off if you have surface water draining into your pool.
 
csoukup6 said:
Living in west coast of Florida and its been raining none stop for 24 hrs and it looks like a few more days of heavy rain. What is the best thing to do after the rain stops?
Circulate the water so it all mixes well, then test it and dose accordingly. Pool Calculator should be one of your bookmarks. Vacuuming helps mix the water well, too. I've found pH remains fairly stable, everything else dilutes. If you need to lower the water level, do that before adding anything; why treat water you're going to dump?
 
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