ya i didnt use the silicone caulk at all thats why i was afraid i ruined my tank i was to dumb to think to look it up first cuz its got a wood frame with glass sides and bottom and caulked all around it to prevent any draft and help keep in humidity...my worry was it will be so humid it will be wet alot everyday and didnt know if any chemicals would seep into the water that flows down over where i caulked. it was scary when everything says use silicone only it will be a vivarium so i knew there had to be some people on here that could help me out with this cant believe i didnt think about this befor hand just went to work haha but none will be submerged just exposed to lot of water in the air