ge silicone 1 bonding aquaterra background to tank

Ge silicone one will be fine. You don't need a lot just enough to hold it in there.

Are you planing on completely sealing the background so no water gets behind it? If that's the case I would line the tank with silicone (where the background will be) then do the same on the background. Enough that when you squish it, it will make about 1/4 to 3/8 of a seal

Better to have too much than too little.

It also depends on the 3d background.., on my foam/concrete background I had a hard time keeping the background secured, but that's because it was~ 4" thick of foam which is very buoyant.

If you have a commercial 3d background made from some sort of resin than you should be fine with a normal bead of silicone around the edges.


Cure time is 24 hours, but if the silicone is more than 1/4" thick or so, the cure time is more like 3 days.

I used GE II silicone with good results, holding my background for about a year. I've heard GE I is basically the same stuff for our purposes.

This is the back of my 90g. Solid slate. Ge1. I used an adequate amount but didn't go crazy from what you can see.

Holds just fine.

I have a 75g with a similar background thats going on 4 years without a single slate piece falling out.

You'll be fine

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