You have yo heat the silica to 220F for 2-6 hours to "recharge" them. They are water absorbers. If you want something for oxygen use the hand warmers.
thorlong 5 days ago
Home depot 10 hand heaters pack $3
You have yo heat the silica to 220F for 2-6 hours to "recharge" them. They are water absorbers. If you want something for oxygen use the hand warmers.
thorlong 5 days ago
Home depot 10 hand heaters pack $3
thorlong 5 days ago