Two days ago my betta Jean-Luc decided it would be a good idea to go exploring in the bubble/aearation tube. He got stuck, and was lucky that I woke up at 9 am to go to the bathroom so I could rescue him. After rescuing him I took his bubble maker out and thought he wouldn't try anything else stupid. WRONG! He ended up deciding to go exploring underneath his bowl (there's a floor for the gravel and a hole in the middle for the aeration tube). So, long story short after getting him out from there I filled the hole with rocks and after I got back from school brought the tube with me to PetSmart so I could find a decoration that would fit in the hole to deter him from exploring.
I ended up finding the "head" of the fish department and she helped me out both with deciding that the decoration I had picked out was good and with making it so I could still use the bubble maker.
She recommended this sealant for the top of the aeration tube and the underside of the decoration to stick to it
I read the directions and waited 24 hours for it to dry. Since I was not fixing the actual bowl I didn't really pay much attention to the 48 hours thing (don't fill it with water). I put the tube in the bowl after 24 hours and just wanted to see if the lights and bubbles worked. So, I turned on the bubble maker and it half-way made the water & my room smell slightly funny.
Is this stuff really harmless to my little Betta, and will he get sick from having it in there/from my turning on the bubble maker?
Please help so I can stop popping into my room for 2 minutes at a time just to make sure he's still alive and I didn't kill him?