why does my pool water keep turning green

Use a water clarification solution. Make sure you have a reliable chlorinating system, whether it is an in-line, floater, or salt system. Chlorine needs to be in the pool
always. Throwing a jug of liquid in it once a week isn't a good way of maintaining the pool. A simple tablet chlorine floater is very effective. You can purchase one on eBay for a reasonable price (see below). Clean your filter. DE filters are by far the best filter to have. Although a bit more costly to purchase at first, they will save you both time and lots of money in the long run. Normal Filter Maintenance DE filters: Sand filters: Backwash once every two weeks. (Be sure to backwash your sand filter for a minimum of four minutes.

Otherwise, you will see filthy water shooting back into the pool. ) Cartridge filters: Every three to four weeks, unless you see algae in the pool, in which case you should clean more often. Soak in tri-sodium phosphate every three months. "Shocking" a pool that has turned green is better known in the industry as "super-chlorination. " When shocking the pool, consider a few factors. How big or small is the pool? How "green" is it? If your pool is a normal residential-sized pool (13,000 - 25,000 gallons; the pool pictured at the top of the article is around 18,000 gallons), then let's consider these options: liquid chlorine, or granular shock.

The choice depends on what type of filter it has. If it is a sand or cartridge filter I would use liquid chlorine, about 10 gallons, or four of the yellow "Jerry-jugs," The reason for this is that granular chlorine will leave a residue that is harder to filter out. , then I will use granular chlorine (about 5 pounds). Remember to test the water before adding shock. The pH should ideally be low when shocking the pool (around 7. 2) because shocking the pool will raise the pH level. Always run the pump when shocking the pool and allow it to circulate for 24 hours. The water should then be a blue or cloudy blue color. Shocking alone does not clear up a green or cloudy pool.

This is what a filter is for. If the pool is filtered properly, you won't need a clarifier solution. In some cases a can be used, a product called "drop out" or "drop and vac" that will bind small particles together and sink all of the algae to the bottom of the pool where it can be vacuumed up as waste. Test the water after 24 hours and start adjusting pH and alkalinity levels. The chlorine will still be elevated, but over a few days it should stabilize. Sodium thiosulfate can be used to lower the chlorine level, but I do not recommend this. If too much is added it will become a game of how much chlorine to add to raise the level.

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