Silicone urgent help!

[Emperornibble]

What kind of silicon should I use on a greatstuff background? Ive been looking through thread but cant find it, please help. Note some of it will be in contact with water.

[Grimm]

For parts that are constantly touching water, use GE Silicone I (also labeled as 1200), or aquarium grade silicone...For all other parts, you can use the easier to find and cheaper GE silicone II. Just make sure to give a few weeks of curring time.

The best silicone should smell like extremely strong vinegar. Ge silicone II does not.