Hello, I'm starting to think about doing B&W film development in my apartment's bathroom. It's a decent size space with no windows so blocking off the light shouldn't be much of a problem, ventilation could be a little problematic as the exhaust fan is on the same switch as the lights so I might have to wear a respirator (good idea anyway) and/or remove the light bulbs so I can run the fan. My big concern though is disposing chemistry, I don't want to just pour them down the drain. I'm interested in working with plus-x and tri-x in diafine and d-76 and efke/adox 25 in neofin blue if I can get my hands on some. My understanding is that diafine has a really long shelf life and can be reused so that one shouldn't be a problem. For all of these combinations I can probably get away with a water stop bath. So that leaves disposing of used d-76 and neofin blue as well as exhausted fix, hypo-clear and photo flow. Any recommendations for economical ways to handle these?