Join Date: Aug 2003
Location: Kelowna, BC, Canada
If it says anything about being for "kitchen & bath," and/or talks about anti-fungus or anti-mildew, then don't use it. It's these chemicals that kill aquatic life, and kitchen&bath silicone is guarenteed to have it.
If you've read everything on the packaging and never saw any mention of those things, then you'll probably be ok, since they'd be sure to boast about any mildew/mold resistance it has. If you don't wanna take the risk, then buy some that's made for aquaria. Same stuff, but at least you'll be SURE that it's safe.
I'm sure a lot of people on here can tell you which specific brands/types they've used without problems.