Ok sorry it took so long to reply. It most certainly is algae.

My filter was not filtering anything so i read another post about how your sand can get channeled. It said to stick a hose down into your filter and run it until the water is clear. It also said to do it for around fifteen minutes or so. I ran it for over an hour repositioning it every ten minutes or so. It was still spewing out green and brown bits but was much clearer so i tried to vacuum at first it seemed to be going well but about a third of the way through it started flowing back into the pool like it wasn't filtering again. I tried backwashing and got some very green water and tried filtering again but it was just going straight through. The nasty part is that there are chunks not pieces CHUNKS of green and brown algae mixed in with the filter sand I tried to get most of them out but there was just so much.

So do i need to replace the sand? I just did last year but left it out all winter and didnt use any winterizing agents to close it. Or should I just keep trying to clean the sand I have with the hopes that it will finally come clear?