CRACK! Need help fast!

[1152 Flying Fish]

ive got a crack and dont know how to repair it. ive lowered the water below the crack but thats 20% of the water. what type of silicoln is non-toxic and or cauk? help would be greatly appreciated.

 

[RamJet]

Most hardware stores, petshops, and even Home Depot type big box stores carry aqua sealent, its 100% clear silicone. It will say fish safe or something like that on it.

 

[1152 Flying Fish]

Okay, Thanks, if you need me i wont answer because im there.