Man I’ll be honest that’s gonna be a difficult one to easily modify which out someone walking you through it in person and you might be better getting a cheap used one at a LFS. My second sump is 25 gallons and it was $25 in the used section. Like you said it pretty much is just one open sump which means as far as return pump and drains the whole sump will go up and down so you have more work to do figuring out the logistics of wverything
Read up on basic dumps a little more
http://www.melevsreef.com/articles/what-is-a-sump
Is a good starting point and he has lots of articles about different types of sumps.
Thanks for the link! Good read and a lot of great info!!! It is a wet/dry trickler. And I can buy just a tank from Petco say the 1$ per gallon sale and use that as a sump right? Seems to be a lot easier and more room to work with! What gallon sump would best suit a 75 gallon? Is there a general rule of thumb?

