frag tank
 

just wondering about GE silicone 1 is it safe and durable to use for a frag tank that is 20" L 10" H 10" D 1/2" thick?

Don't know. Last year, sure, but there have been reports of GE changing the formula. I used it recently on my sump, no issues, but others have reported lots of problems. Best to find some GE 1200.

silicone
 

don't use it-go to cascade and get aquarium silicone or go to your local glass company and get them to order it for you.it's about $12 for a tube of nuflex 333 aquarium sealant