Ok here is a update.
I opened up the filter enclosure and removed the filter.
The filter is covered with green.
I am not sure if the filter will be able to be cleaned so I have been searching for the cheapest place to buy a replacement.
I am trying to identify the filter so I will know a part number or similar specs to look up.
The filter cover has a crack in it and when I started the pump up water was spraying out of the top of the cover from the crack.
I do not believe that the cover will be cheap to replace so I am going to try repairing the crack with some high strength epoxy and see if that holds.
As for the round hole in the ground I need to find an inexpensive place to buy a replacement. If I remember from other poold correctly there is also a plastic basket that is supposed to drop down inside of that hole in order to catch any leaves or debris that is floating. I believe I also need to replace that basket.
Lastnight I went to Dollar Tree and bought 10 gallons of bleach and poured all 10 into the pool and ran a brush around the sides and went to sleep.
Today I went out and netted everything that was floating on the surface of the water. I did notice that the water seems to be a much lighter color of green than it was the day before. The first picture that I had posted in this forum was before I had donee anything and here is a picture from today.
Here is a picture of the top of the filter
I am searching now for the filter by this part number: American Products Company 59054300
I believe that I found the filter, now to find the cheapest place to buy a replacement
http://www.poolfilters.biz/ak-8004.html
Here is a picture of the filter
Here are 2 pictures of the label on the top of the filter housing
And here is a closer picture of the hole next to the pool
I hope that from these pictures you all might be able to help me identify the filter and also find the cover and basket for the hole.
Also, how about my idea to repair the crack in the filter housing with epoxy?