Anovack 40B/20L sump build

[Anovack]

I'm planning on getting a cpr internal overflow box. This overflow box is acrylic and the tank is glass. Will any aquarium silicon work or do I need something special?

 

[Flaxon-Waxon]

 

[Flaxon-Waxon]

Looks like regular aquarium silicone will be fine...

 

[Anovack]

Dumb question but my ato would go in the return section correct?

Also som sad news but think it's the right thing to do. I won't have the build done for a couple months till mid May for a couple reasons. I'm sailing around in the British Virgin Islands for 2 weeks in April/May and I also want to save and use some of the refund check to get all my equipment at the same time instead of upgrading with time. I also have a issue with wanting the top of the line stuff so it will be pricey.

With a lot of attention needed with a new tank I don't want to take the risk of starting off on the wrong foot. I'm sure I will still be asking questions on this forum to get it completely ready to go once I'm back.