Silicone

[Aquattro]

I use GE I or II, depending on what's at the store. Make sure there's no mildew resistance, you're good.

[lastlight]

I used GE I (no mildew resistance) to reseal my sump. I'm seeing NEON (literally) yellow and pink growth only where there is silicone. While I see a tiny bit of the pink in my display (not GE) it's abundance in the sump has me wondering if it's silicone related.

Anyone ever see/hear of this?

[Lonster]

Thanks everyone. I'll go with the silicone 1

[BlueWorldAquatic]

GE1200

We use that to build our tanks.

Call Edmonton Fasteners for it.

Ken - BWA

[mr_alberta]

I agree with Ken, GE SCS 1200 silicon is the strongest stuff out there and is what our tank builder uses as well.