It's best if the water is cleaned before you close up the pool.
Drain it and refill it
Pour in a gallon jug of algecide and increase the amount of chlorine you use and run your pool's filter at least 6 to 8 hrs a night. Will clear up in a day. Of course this info depends on size of pool, but the average 16,000 gallon pool will clear up.
Your water is turning green due to algae. You need to scrub your pool walls to and then "Shock" your pool by adding chlorine. Keep your pool filtered and it should clear up in a few days.
Use a floculant you will be able to get this at your pool shop You wil end up loosing a litle water but it is the best way to get the water crystal clear.
maybe someone threw up in it... lol
Watering a plant with any type of salt water will cause the plant to wilt. Because of the salt outside the plant cells, water leaves the cells in a process called osmosis. With less water in the cells, the cells shrivel up. If they shrivel up, the plant loses it's ability to hold itself up.
You flock a pool as a last resort to clear the water. If you cant get the pools water to clear up using normal filtration then you may need to use a floculant. let the pool settle completely for a couple of days. This will cause the impurity's to settle to the bottom of the pool from where you then carefully vacuum the bottom layer of cloudy water to waste. most pool shops wil have the floculant and instructions required for this operation. Have them test your pools water before you do it though.
Take a sample of water in a clean bottle from about as deep as you can reach into the pool. Take this to a pool shop explain your problem the y will test the water for free and advise you as to what needs to be done. Or you can get a test kit and do it yourself.
It sounds like you have an algae problem. Shock the pool and toss in a dose of algaecide. Take a sample of the water along to your pool shop and get it tested while you are getting the algaecide.
Your pool probably has an algae issue. You can clear it up by giving it a good pool shock. Keep the pH between 7.2 - 7.4 and TA 80 - 100. Backwash twice per day until the water is clear. Vacuum and brush to loosen up any residual algae.
Is the power on, do you have a breaker, is the water level up, there are so many reasons for a pump not to work more information is needed.