Over last winter my salt water pool was apparently infiltrated with frogs. I removed over 20 by hand so I can’t imagine the amount of tadpoles spawned in there. Unfortunately this resulted in not being able to use the pool all season because we could never get it clear from what appears to be black algae. At this point the pump and filter are not even running but I’m afraid if I leave it like this until next year I am ultimately allowing more damage to the liner and system itself. So, I’m thinking a few different things and hope to get some educated feed back! First, I do realize that I have to replace the sand in the filter. I’m wondering if trying a pond clarifier like barley or another natural bacteria might work better than the shock did? And I’m thinking to get a really good shop vac, possibly filtering the water before it returns to the pool, and then treating again? Or do I need to start over? Is it a good idea to try to treat the water not using the filter at this point? It’s time to close down anyways but I’d like to at least prevent it from worsening over winter. I could use an aerator for water flow possibly? There is a pond “below“ (sloped property) that we normally backwash into but I haven’t much because I didn’t want to battle this issue on a bigger scale…. Any advice is appreciated!