Also, bleach with different filters do not seem to fix the problem. Most bacteria that occurs in pools is not harmful, but simply causes problems, such as cloudy water, green water, or unsightly buildups that can damage equipment. Calcium scaling is an unsightly white to white-grey stain that forms on pool sides when a pool’s calcium levels and pH are imbalanced. I have a 20,000 gal in-ground, self cleaning, concrete salt water pool with a chlorination cell. Located in NSW (Australia). But they may also be a sign that your hot tub contains white water mold, which is an overgrowth of biofilm. Although it may be difficult to do, calcium scales can be removed -- and preventative steps can be taken to keep them from reforming. White powder and sediment on the bottom of your pool can be very frustrating. If this happens, it needs to be taken care of right away. I guess their fur soaks it all up. You brush and vacuum but it … Sounds like white water mold to me. The pool clarity is very good, this is the pools 4th season. I vacuum weekly, and I'm getting a white flakey substance on the bottom of my pool. "It's the source of a phenomenon that many pool owners and service techs have noticed over the years, where they observe small white flakes next to the return on a saltwater pool. Flakes settle on bottom until disturbed. If you see a layer of white or greyish-white grime on the sides of your pool around the waterline, that's calcium. This is especially true for saltwater pools and salt water pool system. When I grab some with my net, they breakup with fingernail pressure, and dissolve. Is this calcium and what can I do about it? If you add any more calcium hardness increaser your salt cells might calcify and burn up, shortening its life. White flakes are usually caused by calcium scale deposits. You can go here to learn how to get rid of that: Water Mold If the flakes stay, it's probably calcium and/or mineral. If you see white flakes it is actually not paint but may be either calcium scale deposits or biofilm residue in your pool due to bad pool chemistry. You can either do this yourself with a pool test kit, or bring a water sample into a pool service store to do it for you. Let’s take a look at the most likely causes of these white flakes and what you need to do to get rid of them once and for all. If the flakes disappear, they are most likely a biofilm buildup from mold. 0 0 0. I have just had a salt system installed and discovered this. Your chemical readings are perfect yet there's this strange film on the bottom. Add 15 – 20 drops of bleach or liquid chlorine to the water and allow it to sit for 30 minutes. White Powder On Sides Of Pool.