this is actually a plastidip test. figure if i can make cardboard waterproof it will work in a larger application.
so i sealed it up, and was leaking, then got some silicone , to seal, as plastidip is a lot thinner than i thought it was. so wouldn't cover joints on its own.
added water to it again yesterday. left it for 4 hours and had 2"x"2 puddle under it. so there still is a very small leak somewhere in one of the joints, i didn't have a silicone gun and got quiet messy with it. im going to fill it today, add fish and see, if fish safe. but from what i told, it is. while doing that going to do water change in sword tail breeding tank.
and then im going to take apart the beer tank. and see if the cardboard actually became waterproof. or if the plastidip was what was actually leaking.
from what i can tell it is the silicone. that's just leaking. not the plastidip its self. i don't see that the water penetrating through and into the cardboard.