I use a 5uM sock to filter my GFO effluent back into my sump and this is the sock after a couple months
This is it after 24 hours in bleach
Here it is after 48 hours in a bucket of water with 1/2 cup muriatic acid
Then after 24 hours in a bucket of water and 40 drops of prime
Not sure what's in Prime but this sock is ready to go again

This is it after 24 hours in bleach

Here it is after 48 hours in a bucket of water with 1/2 cup muriatic acid

Then after 24 hours in a bucket of water and 40 drops of prime

Not sure what's in Prime but this sock is ready to go again