@randyBRS - great video! I would note that the differences between some of the mixes are within measurement error. I highly doubt your scale is accurate to within a half gram when you measure 25056.5g! Regardless it's great information to have. You should post the actual number of gallons each mix makes at 35 ppt on your web site so it's easier to find and compare.
Lol.. I'm also sure the 1/2 gram here or there really made no significant difference, but pleasantly surprised when the 20gal tanks for the following test each came out to be exactly 35ppt based on my calculations from this test.