Silicone okay in Koi Pond ?

Question:I am building a waterfall for the koi pond. The top box that water flows out of has a very wide weir and I am having a really hard time keeping the water from flowing out of the corners where the liner meets the fiberglass weir. I could sure use some advice if anyone has some for me.

Answers:
You need to get a silicone meant for aquariums other kind could be toxic to your fish.If you repost your question in the fish section you might get better answers.