My sump

[BCWolfen]

Stir Crazy,
I will be adding a pipe in from over the top that comes from my topoff container. I will be mounting a foat valve in the return section to trigger the flow.

Stir Crazy/Rikko,
Thanks thats a great suggestion. I will add another baffle in the return section set 1" off the bottom.

Willow,
The site where I orgiginally got some of the design ideas manufactures sumps as big as 55gal out of 1/8" Although they use a brace around the top.

I sent the design to a local acrylics company and they said 1/8" too light. 3/16" would work but for $30.00 more they recommend 1/4". I'm assuming they know what they are talking about, so I'm going with their recommendation.