sugestion of how to build a ref/sump.

[hcakebox]

I need help in how I should divide a 40 galon tank in a ref/sump.
Please help.

 

[WLDSHARK]

check this out...

http://www.melevsreef.com/acrylics/sumps/glass/index.html

when i did my sump.. i follow the steps in the link.. and it worked perfect.

good luck