I can't claim that lol. My sump will have a 300 gal trough, and two(maybe three) 55 gal barrels. So 410 gal capacity in my filtration. That's still 10% of the total volume of my tank though!
your brave Necro trying something out new on a project this size. keep it up though when it works it will be worth it. its gonna be awesome and then you can put up video of you swimming with your fish
lol, I found this stuff at home depot that looks very similar to the other product that is being used on a build on this site. It's $39 for a 5 gal bucket at home depot. It is an asphalt emulsion based latex paint. Used to seal driveways and basements.