Do you cover the pool right after closing or wait a day or two?

syedsam

Member
I’m closing the pool this weekend and not sure if I should shock, balance, and then put the cover on the same day or let it circulate for a bit before covering. What do you guys do?
 
I usually shock, let the pump run overnight, and then cover the next day. It gives the chemicals time to mix properly and the water clears up before the cover goes on.
 
I usually shock first, let the pump run overnight, and then cover it the next day. It gives the chemicals time to mix properly and the water clears up before the cover goes on
 
I usually shock first, let the pump run overnight, and then cover it the next day. It gives the chemicals time to mix properly and the water clears up before the cover goes on.
 
I usually shock first, let the pump run overnight so everything mixes well, then I put the cover on the next day. It helps the chemicals spread evenly and the water is usually more settled before you close.
 
For me, I usually shock first, let the pump run overnight, then put the cover on the next day. That way the chemicals have time to mix evenly and the water settles down a bit before you close it up. It just feels like the safest, least stressful move.
 
I usually split it into two steps, not because it’s mandatory, but because it gives you one last chance to catch issues before the cover goes on.

After shocking and balancing, I like to let the pool circulate for at least a full evening or overnight. That does two things. First, it lets everything actually mix and react instead of trapping fresh chemistry under the cover. Second, it gives you a final look at the water the next day. If it’s cloudy, smells off, or the chlorine got chewed up faster than expected, you can fix it while the pool is still accessible.

Another small benefit is off-gassing. Strong chlorine right before covering can get trapped and sit against the cover underside all winter. Letting it circulate with the pool open for a bit helps that burn off so you’re not sealing in harsh conditions.

If the weather is stable, waiting a day is usually worth it. The only time I cover immediately is if a storm is coming or temps are dropping fast. Otherwise, that overnight buffer has saved me from a couple of “wish I caught that first” openings in spring.
 
Honestly reading the others, I’m on the same page about not covering it the same day. I balance first, make sure pH and alkalinity aren’t too high, then shock and let the pump circulate overnight. I once covered it right after adding chemicals and when I opened later the water just didn’t feel fully settled. Since then I always give it at least several hours or overnight so everything mixes evenly and the filter pressure looks normal before putting the cover on.
 
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