It literally turned into a swamp. The less expensive calcium based shock can leave a white film on your plaster over time. or on the swimmers, or off-color swimming pool. The water is clear and I can see right to the bottom of the deep end, but it is still green. The next most plausible explanation was the pool turned green from copper. Yellow water in the pool does not necessarily mean that the water is unclean, as more often than not the problem is simply that the pH balance is off. Bring up a low pH rating by adding baking soda or lower a high pH with muriatic acid diluted in water. Please help me! Wiki User December 16, 2007 1:43AM. The water of your new plaster finished pool might turn green when you added chlorine because of iron in your water. With the right chemicals and a few simple steps, it’s easy to bring your pool water back to clear and sparkling. The pool turned green from copper, not algae. How to Clean a Green Pool? It is certainly best if you never let your pool water get this dirty, however most pool owners experience a "green pool problem" from time to time. New pool just filled today - 2 hours later water is GREEN! One part of regular swimming pool maintenance is chemically shocking a swimming pool. You heard new pool water is green and turns blue in a few days is this true? Have owned this pool for 4 years but I never seem to get it right. Stains on the pool surfaces, pool equipment. The condition of your pool's water before you shock it can also play a role in whether or not it ends up as cloudy pool water afterward. You pool generally needs to be filled with water that has been filtered for iron. by Leslie (Chesterfield, Va) After filling the pool, my children put chlorine tablets in a floater and tossed it into the pool. water. This is because an abundance of dead algae particles are suspended in it. Sometimes with the sun out it would turn almost blue, but then it rained and turned green again. Here are the major causes of metals in a pool and how you can control metal stains. Think of the Statue of Liberty. Why Did New Pool Water Turn Yellowish Green? For example, if the water is fairly basic, with a pH over 7.6, shocking the pool can disrupt the solution of bicarbonates in the water. Then it's rained almost every day. The water of your new plaster finished pool might turn green when you added chlorine because of iron in your water. If the pool water is still green-ish, more pool shock is needed. “The pool cover will block out the light, and kill the algae, right?” Closing a pool that is green with algae, or dirty with debris or with water that is unbalanced, leads to heavy staining and saturation of the water with dead algae cells, which makes it easier for subsequent generations to grow. The problem I have right now is that there is a green tint to the pool water, which is a fresh fill from the water … These chemicals also affect the … 2.5 lbs of shock per 10,000 gallons - green water, no visible algae on walls 5.0 lbs of shock per 10,000 gallons - deep green water, visible algae on walls Note: If you have a colored surface on your pool, spend a little extra and buy the fast dissolving shock.