I’ve seen that the most common occurrence of green water in pools comes after pool owners return from vacation. So how do you prepare your pool so that you will have a nice clean pool when you get back from the beach? Here’s how:
1.First of all, backwash or clean your filter. Your filter is going to pick up debris and clog while you are away, so clean it good before you go.
2.Clean out baskets in your skimmer and your pump. These baskets will be catching debris while you are gone, so clean them good before you leave.
3.Make sure that your water level is where it should be. If it is not then fill it to the desired level. Water will evaporate while you are gone and you don’t want it to drop so far that your pump will be running without water in it. If this happens you will come home finding that you need to replace your pump.
4.Check your pH and adjust as necessary. This will protect the pool water from getting out of hand while you are gone.
5.Shock your pool with a double dose. This will raise the chlorine level of the water fairly high. The good thing about this is that if it rains the entire time you are gone and the pool gets filled with bacteria that can turn the water green, your pool will stay safe and clean. The chlorine content level should be back to normal when you return.
6.Vacuum the pool out. Chlorine gets used up by trying to dissolve the physical debris. If you vacuum the pool before you leave, all your available chlorine in the water will be available to kill contamination.
7.Set your pump timer to turn your pump on and off, or if you do not have a timer, then run your pump for 24 hours a day while you are gone. This is a “better to be safe than sorry” decision.

Then go on vacation and know that when you return, you will have a sparkly clean pool.