Typically, greenish-brown colored stains are related to something organic like algae or leaves that were left on the pool floor. These substances need to be removed as part of the treatment. Organic pool stains are not usually hard to remove but with time, your pool will start to have a dull, light-brown color that you won't be able to remove. The brown discoloration happens very slowly and can be hard to notice at first.  If you have trees that hang over your pool, watch for leaves, branches, or fruit that may drop down into the water. You can use a pool skimmer to routinely clean out the debris. Any organic debris that floats to the bottom of your pool needs to be removed with a pool vacuum. You can use a hand-held vacuum or an automatic pool vacuum that uses a sensor. If permanent stains do develop, you can drain your pool water and acid wash your pool if it has a plaster liner. This is not something that you can practice all of the time, as it involves a purposeful stripping of a thin layer of pool plaster. In order to restore the bright white surface, you need to use an acid wash around every five years. This may quickly remove greenish-brown colored stains that build up from organic stains. You may also want to try an enzyme based pool chemical. All natural pool enzymes will eat away at organic material to remove the pool stain with little or no scrubbing and without the use of harsh chemicals that damage pool liners. If your stain is all around the waterline of the pool because of material floating at the top, an enzyme-based cleaner will help to break down organic compounds and oils by speeding up the chemical reactions that assist in making stains virtually disappear on their own. Follow up with a thorough brushing to make sure you've got all the left behind debris and oil. Organic stains are best addressed by heavily chlorinating the water, then giving your pool a little TLC with a good brushing. You can use a long handled stiff brush to get all around your pool. Try pouring a small amount of chlorine shock right over an organic stain to make it disappear instantly. Beware, this works great on plaster pools, but don't try this to remove stains on a vinyl pool because it could remove the liner pattern. Test the water to ensure the balances of pH and alkalinity are where they should be. The pH level should be between 7.4 and 7.6, while alkalinity should be between 100 and 150 ppm (parts per million). Carefully pour the acid into a piece of PVC pipe, and deliver the acid to a stain on the pool wall. Be cautious, if the whole pool is lightly stained, you may end up with a a bright white spot that is surrounded by a darker color. After using your stain removing product, make sure you shock the pool so that you have a sufficient amount of chlorine in the water before it goes green from an algae outbreak. Try a tile grout scrubber to get in between fine cracks. There are two different types of heads you can purchase. One is for a concrete pool, and the other is for a vinyl pool, so make sure you check which one you need before purchasing. Once you have it, you can attach it to your pool pole to remove those hard to reach pool stains.
अपने पूल के सर्फ़ेस से ऑर्गेनिक मटेरियल्स को हटा दें: अपने पूल को एसिड वॉश करें: दागों को निकालने के लिए एक एंजाइम शॉक ट्रीटमेंट और एक कड़क स्क्रब ब्रश इस्तेमाल करके देखें: अपने पूल को क्लोरीन से शॉक दें: म्युरीऐटिक एसिड (muriatic acid) और एक स्क्रब ब्रश से लोकेलाइज्ड स्टेन्स को निकालें: किसी अब्रेसिव ब्रश के साथ में कठोर केमिकल्स मत इस्तेमाल करें: