is this the first time that you prepared it?
Is your tap water particularly hard? If so, your precipitate is calcium
oxalate. Perhaps not harmful, but I would prefer to filter or decant it.
Last week, I made my potassium oxalate developer. I haven't used it yet,
but notice that there is a decent amount of precipitate in the bottom of
the bottle. Not matter how much I shake it up, the next day it's still
Should I just filter this out? ...or be worried about anything else?