Quote:
Originally Posted by Steve Nguyen
I plan to pour concrete to build the bio-filter with matala mats. any recommendation on how thick the wall should be to prevent water from leakage? the walls will be re-enforced with rebar to prevent cracking. I was going to use cinder blocks but since these are roughly 3x2x6 ft filter, which is small, I thought I pour concrete by myself.
also, if there is any draw backs on doing this, please let me know.

if there are other methods of accomplishing this, please share your idea as well. I must have a custom size of 3x3x6 ft though.
thanks,
Steve