Diy Co2 help

[naluralstyletanks]

I have a diy CO2 system with 2 liter soda bottles, and am having difficulty sealing the tube connections, I was wondering if the mildew free silicone could be used in this situation(it's what I have on hand) I know you can't use it to assemble aquariums but I'm unsure on this since it's not in direct contact with the water.
It's currently sealed with hot glue, which isn't the best seal and it stopped holding pressure about a week ago

 

[DaveKS]

Stop with this pop bottle junk. Go buy one of these type of vessels. Acrylic, chemical weld in a nipple and your good for at least a decade of trouble free CO2 output. Great thing about these wide mouth containers is you can scoop out half of volume then fill it right back up with some sugar water to refresh its output.

https://www.amazon.com/OGGI-Large-C...d41-a8bc-0e56d4c6bb6d&pd_rd_i=B00CSG0OP0&th=1