Tank aqua scaping help

[Aquattro]

Originally Posted by Coralgurl

Please excuse my ignorance or stupidity with this as I've read Albert's post a few times. Sump vs DT - basically flow to push the water through the rock? (obviously over simplifying the entire explanation)

And, Brad, you have 100#'s in what size tank? Next question is then do I need 150 #'s in the 180?

Not sure I understand the first part.

No, I have that in a 180. So I would use anywhere from 90ish to 120, depending on porosity, shapes, etc.