Quote:
Originally Posted by bradac56
"everything submerged in water weighs a lot less" that got a chuckle out of me. While I understand what you meant and agree one gallon of water weights 8lbs so in a 100gal tank that's 800lbs + 135lbs for the 9 bags of flourite (or whatever you use) so that's a lot of nothing! 
- Brad |
Let's assume I fill my 100 gallon tank with water - 800 pounds or so of water. Then I pour 135 pounds of Flourite in the tank. I end up with a lot of water on the floor, my wife threatening me, me contemplating jumping off a bridge, but I don't then have 935 pounds of stuff in the tank. I have 935 pounds less however much water spilled on the floor. The tank is still full as it was before I added the Flourite. So, didn't I add less than 135 pounds to the tank? Therefore the Flourite weighs a lot less in the tank than not in the tank.
If this seems hard to believe, please conduct this experiment
(I will hide out for a few months just to be safe, in case you tell your wife I egged you on to it.)