Negligence. failure to clean the dirty filter - failure to maintain chlorine, pH levels - failure to run the pump and filter long enough.
Any one or all of the above listed items. Clean the filter. Run the pump 24/7 until water clears. Add chlorine - a minimum of one to four gallons - for plaster - depending on pool size and type. You may need to add Yellow Treat or Yellow Out for severe algae growth. FOLLOW THE LABEL INSTRUCTIONS!!!!!
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the chlorine, it also turns blonde hair green, trust me
When a pool turns green, the cause is the build up of algae. To remove the algae, chemicals will need to be bought to restore the PH levels in the pool, killing the algae.
You have to treat pool water with pool chemicals and use a pool filter to get and keep the water clear.
It Turns Green. Its not the chlorine, it av=ctually hard metals such as copper
By killing the green algae with an algaecide available at your pool shop.
Cut down the Pecan Tree. The tree is in not on my property I have run across this problem with Eucalyptus Trees, as they have a high phosphate content in their leaves and sap, being algae eats phosphates .... a green pool in less than a day. I recommend that the next time your pool turns green. Take a water sample ( 16 0z water bottle is perfect) to your local pool store, Leslie's is our local branch name; and have them analyze what agent in the sap is causing the algae to be hospitable. They may also recommend a product they sell to remedy the problem. Hope it works out for you.
it turns black
There may be a part broken inside the filter allowing waste to bypass and circulate back into the pool. You should clean the filter then inspect for cracks, rips or other damage.
Green
My pool looks fine, thanks.
NO! copper turns green
The green is algae, add chlorine to make it go away.