FX-37 Help

Went to develop some film this morning and I noticed some sort of particulates floating around in the developer. For lack of a better description, it looked a bit like undissolved Hydroquinone; though each particulate was larger than any developer crystal. This issue was from a 250mm brown glass bottle that I've been using since mixing a 1L batch a few weeks ago; therefore, there was some air in the bottle as it was used. I checked my smaller 125mm bottles that I filled to the brim and have not touched in 3 weeks, and they're fine. Anybody have any idea what's going on here? Does FX-37 have some sort of strange response to air? I went ahead and developed the film and it looks fine so I'm clueless as to what going on. FWIW, I'm sure all chemicals were dissolved properly when I made up the stock solution.

Any insight would be greatly appreciated.

Best regards,
AlanH

I assume that all the bottles were stored similarly. FX-37 has a rather unremarkable composition for a PQ developer. Off hand I don't see any specific chemical that would come out of solution. Try warming and gently agitating the solution. If this does not work then filter off the crystals before use.

Yes, all bottles were stored similarly. I didn't think of warming it...I'll try that. Thanks!

Best regards,
AlanH