I have a 16x32 inground pool and cannot get rid of the green algae.

I have added tons of shock and stabilizer while running my Hayward sand filter. I was told adding a few pounds of DE could help improve the filtration. Is this true? I'm not having much luck getting rid of the green algae and I'm trying to find an efficient way, as I keep wasting time and money on chemicals without results.

Thank you.