So every couple months I clean my resin contaminated alcohol using alum powder (link to a video about the process)
After cleaning it I let it sit in the settling containers until I need to clean my alcohol again. At which point I swap the alcohol that was cleaned into my main wash and cure station tub and then put the dirty alcohol into the other tub I use exclusively for cleaning the alcohol.
Edit: For those curious I can share an image of what the alcohol looks like after it’s had 24 hours to settle in the settling containers.
How many prints do you think you’re putting through before you’re cleaning it.
I run mine through a porous rock filter (I’ll try to find the video link) every couple of months.
Typically I pre wash with Mean Green, then into the isopropyl which helps extend the life of the isopropyl.
No idea unfortunately, I typically only print a few build plates of models a week and then it’s a few months between cleanings like this