Frogs and swamp in pool so far just shocked pool double amount 4 times with filter running 2 days now it is light green and I can't see the bottom 18 foot round 4 feet pool levels are off now what?

you still have algae alive in there. ideally go to your local pool shop and buy liquid chlorine (trust me it is much more effective) dose the pool with 20 litres and over night it will be back from green. Then you will have a very cloudy pool. what you want to do then is buy what the call a floculant (common product name is polyaluminium chloride) but there are others. run that through the system on recirculate(if a sand filter) or without the filter elements(if cartridge filter) for 8 hours and switch the pool off for 24 hours. the dead algae will drop to the bottom of the pool and you can vacuum it straight out onto the garden and have a nice crystal clear pool. this process works I have done it over 4500 times.