comments:
Erm... have you tested the usability of that approach with a hygrometer? This kind of solution would be a PITA to operate, as with the circulation such a small amount of silica gel will not last for long (max few days provided your filament is still dry, if not we are talking max few hours but it depend on how sealed is your dry box). You would be much better off with small sealed boxes sold quite cheap in many places that fit a single filament spool - add a single in-spool box of dried silica gel and you're done for months or even years.I'm using these containers:https://makerworld.com/en/models/1476361-silica-gel-container-drying-spool-ams-2-pro-ht?from=search#profileId-1540969 with similar sealable boxes (these fit 95% of 1 KG filament spools but they have to look exactly the same is in these pictures - with round intake that has a small lip for opening):https://www.amazon.com/AMZPro-Filament-Storage-Box-Water-Proof/dp/B0FPM7KKGN It's much more convenient and you can use your AMS 2 Pro for convenient drying of multiple silica boxes at once (Clear PETG is enough for AMS 2 Pro temps, PC is preferable but pain to print in P1S - still doable though).