Review on Milliard Citric Acid: Premium Pound PAIL for Cleaning, Cooking, and More! by Joshua Albright

Year round our pool pavement is stained from wooden tables set on a shelf and metal toys left on the bottom of the pool and sometimes deadly blue-green algae spill onto the shelf. We use citric acid to remove these stains. I threw the entire 10 pound bag into our 40,000 gallon pool and focused on the stains. I could start with half that amount and wait for the results but we've been doing this for 9 years now and I always end up adding an extra amount. so that there is no chlorine in the water and the pH is 7.2 or higher. Chlorine doesn't harm the process, but it does destroy the citric acid. You want the pH to be high because the citric acid will lower the pH. We have disabled the filter for 24 hours, but this is not required. I avoid rainy days so as not to dilute the water. After two days we start adding bleach (from a bottle) to gradually increase the chlorine level. As soon as the chlorine level reaches an acceptable level, we start adding salt again. When the chlorinator registers a sufficient amount of salt, we turn on the chlorinator and gradually begin to increase its amount. All this happens at a water temperature of 60 degrees and above. I have notes to add 2 liters of Metal Free from Natural Chemistry after a few days, but I never do. Our pool never needs anything to raise the pH as it does it all by itself. My notes also say not to use electric shocks for two weeks. The process returned most of the plaster to a brilliant white, but it failed to completely remove the rust stains at the bottom of the deep section. Addendum: Chlorine level in my pool. dropped out after a week of heavy rains and i had algae stains on the floor. I sprinkled Clorox Control Bleach Crystals, regular, 24 oz bottle over all the stains. The crystals sank to the bottom and took some time to dissolve, killing the algae within hours. In the spring I will not refuse citric acid, but the rest of the year I will use chlorox crystals.