Heather, I have used Liquid nails on the outside of the cap only and it has held wonderfully. I have even used it on an active generator, where the silicone was leaking under pressure -- I peeled off the silicone and generously appplied Liquid Nails to the junction. The seal held then and has held ever since. Liquid Nails is a clear caulk (?) found at Walmart or Home Depot, or if you are lucky, out in your garage. Ann Viverette > > Date: Fri, 18 Jun 2004 20:38:18 -0700 > From: Heather J Gladney <hgladney@comcast.net> > Subject: [AGA Member] DIY yeast bottle cap glue toxicity? > > How important is trace toxicity from glue securing airline barbs in the > caps of DIY yeast bottles? > I had several combined factors that may have killed 4 of my bigger fish, > such as pH and heater/room temp overheating, but also using a different > glue on the bottle caps for the new yeast batch. > I'd been using silicon before. The odd thing is, puttin the new caps on > a different tank, fish are fine. > I let the Outdoor Goop for 5 days, but it still had a very faint > plasticky odor. In a previous experiment with it on the same tank, I'd > let it outgas for more than 2 weeks, to no obvious ill effects. My > sister commented that Outdoor Goop is really toxic, she thought there > were warnings to parents about not letting children get hold of it at > any time. It isn't the same as the regular indoor Goop. > Goop was recommended on one of the other aquarium CO2 lists, but without > specifying which type of Goop. It does hold the stem and cap together > really well. Normally I'd prefer the silicon, but over several months I > found silicon is not adhering to the plastic of the bottle caps well > enough to hold up when I'm banging bottles about underneath the tank (as > carefully as possible, but still!). > Should I try gluing the next batch of bottle caps wiht it and let it air > longer, or give up and go back to silicon? Silicon isn't nearly as > secure or solidly attached to the plastic. > I was also wondering if I could get away with gluing the silicon first, > then layering Outdoor Goop over it only on the outside, or if I should > go buy the regular Goop (not outdoor), or if I should do the silicon > then layering with the regular Goop. > > Thanks! > ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/