koiguy1969
GIGGETY-GIGGETY!!
if you put it on the floor of the tank you will have to grind out the structural honey combinng off the bottom of tank... mine is in the center , on the wall as close to bottom ass possible...https://www.gardenpondforum.com/my-70-gallon-skippy-filter-t3083.html...this may help your build but the flush valve is the only thing i didnt post in the thread..but its the same as in https://www.gardenpondforum.com/koiguys-55-gallon-bio-filter-skippy-style-t4339.html... the shower drains are sturdier than bulk heads.