I have to say that you are certainly all making a mountain out of a molehill and trying to compare apples to oranges. Yes, outside measurements are often employed in the classification of a tank but so is the water level. When a 72 gallon tank is filled completely to the top, it will hold within a 5% tolerance the advertised gallons. The problem arises that we do not use 100% of the tank. Most often we use approximately 80% in a realistic application. Some people don't fill tank to the trim and are using even less. Add in substrate, decor, and fish, displacements are more pronounced. Example a 150 gallon tank may only hold 146 gallons (within 5% of advertised) and you actually use maybe 135-140 gallons!
Get a grip on reality!
I AM CURIOUS TO YOUR REACTION COMMENT OPINION ON THIS LINK
http://www.bestfish.com/tips/052198.html
AND WONDERING HOW YOU CAME TO A 5% TOLERANCE LEVEL - IS THAT YOUR TOLERANCE LEVEL, OR THE GENERAL CONSUMER PUBLIC, OR THE ACTUAL PURCHASER, OR THE MANUFACTURER OR WHO?
& DID YOU MISS MY STATEMENT THAT MY TANK WAS BARE BARE BARE LIKE A NAKED BABE BABE BABE JUST AIR AIR AIR?
& I FILLED IT WITH 1GAL. JUGS TO THE BRIM? & THERE WAS NO SPEEDY EVAPORATION INTO THIN AIR WHILE FILLING?
HOW DOES ONE DO A REALITY CHECK IF YOU & THE OTHERS CONTINUE TO DISPUTE DOUBT MY FILLING UP MY TANK CAME UP SHORT OF 72 OR 71 OR 70 OR 69 OR 68 OR OR OR! MY REALITY IS 63!
I JUST FEEL A BIT DISAPPOINTED THAT MY 72 IS A 63. SORRY IF YOU FEEL YOU NEED TO INTERJECT YOUR OPINIONS & REPEAT WHAT CASH & FROGGY HAVE ALREADY STATED (GEE THEY BEAT YOU TO THE PUNCH - GRATED MINDS THINK ALIKE THEY SAY).
EXPERIENCE IS THE BEST TEACHER. THERE'S REALITY FOR YA! :uhoh: