Thanks guys and gals for your input on the spa-flex it turned out to be 1
1/4" and had to replace it with the right 1
1/2" witch fit tight now,Process is going a little slower than I expected and during all the cutting and moving a couple of rain barrels I sprung a leak that I had to clean about 75glns out the basement

. And now I have a couple commercial fans running with all windows and doors open,a little chili

.I must say,crazy as it might sound,have to enjoy this hobby to much to be able to go through all this

here are few photos of what is done so far.
50 feet roll of 1.1/5" spa-flex
Left side untouched
Cut out of the right side
Inside the aquarium room showing one shallow frag tank and on its right will have another 60glns frag tank to.
Full wall photo with the cut-out covering the 180glns
