Painting the back of your aquarium?

[Rock-N-Ruin]

I used gloss, you could go totally bold and airbrush on red and purple, give your coraline a little jumpstart....J

 

[mlawrencemsc]

I'd use flat black or blue it'll have some what of a gloss look to it anyway when your looking at it from the front side. Looking through the acrylic will give it a gloss look anyway.

 

[Elmo18]

I would go like Jeff said,

Krylon Fusion. Amazing stuff.

- Ilham