20 year old salt pool, with DE filter. The salt cell was leaking badly 8 months ago last summer. Had to stop the circulation. By the time new cell arrived 2 weeks later, the pool was green already. After the children moved away, we never used the pool. As a result, it's not been maintained for 8 months. After the autumn of 2019, there a ton of oak tree leaves at the bottom of the pool. I can't see anything 1 inch below the surface. Every time I scoop the bottom using the net, I get a net full of leaves and slimy thick algae debris. Please see the picture -

- Should I drain the pool completely, clean it up, then, refill?
- Or, test the water, rebalance the chemicals, shock? I imagine, a LOT of filtering and back wash to get rid of the slimy algae debris.
Advices and suggestions will be greatly appreciated!!!

- Should I drain the pool completely, clean it up, then, refill?
- Or, test the water, rebalance the chemicals, shock? I imagine, a LOT of filtering and back wash to get rid of the slimy algae debris.
Advices and suggestions will be greatly appreciated!!!