Measuring it gallon by gallon adds room for error and would take all of the fun out of my question.
Porosity would allow water in so It would not affect displacement. A simplistic example would be if you had a 1 lb gold bar and a 1 lb gold bar with a hole in it, they would displace the same amount. Wouldn't live rock be the same? Porosity would allow water inside it right?
My reason for wanting to know is for example if I have a known volume of say 100 gallons exact I know if I add 5 gallons of plain RO/DI water, (5% of the system's estimated volume) it should lower my salinity by exactly 5%. Math tells us 35 ppt lowered by 5% would yield 33.25 ppt. To review; I plan on adding 5 gallons of RO/DI water to my system, to dilute my salinity by 5%, yielding a new tank salinty of 33.25 ppt, or a SG of 1.024-1.025.
So far I have come up with 1 cubic foot of water is 7.5 gallons
Argonite is 27.216 lbs per cubic foot if my metric conversion is correct.
So 10 lbs liverock would displace .4512 cubic foot or 3.384 gallons.
http://www.nano-reef.com/forums/lofiversion/index.php/t189655.html
8.2lbs/gallon add together 8.2 times 30= ?
One US gallon of gasoline is approximately 6.3 pounds
Five gallons of pure water weighs 41.725 pounds @8.345lbs per gallon.
Full or empty? If empty, about 15 - 20 lb. If full, about 175 lb.
145,290 pounds at 8.35 pounds per gallon.
20 pounds/5 gallons = 4 pounds/1 gallon or 4 pounds per gallon.
It depends on what you have 12.5 gallons of. Water weighs 8.34 pounds per gallon. so 12.5 gallons x 8.34 pounds per gallon =104.25 pounrds. Gasoline weighs only about 6.2 pounds per gallon. 12.5 gallons x 6.2 pounds per gallon = 77.5 pounds.
12 gallons of gasoline weighs about 75.6 pounds @6.3 pounds per gallon.
To convert gallons of water to pounds, you can use the conversion factor of 1 gallon of water = 8.34 pounds. So, if you have 10 gallons of water, it would weigh 83.4 pounds (10 gallons x 8.34 pounds/gallon).
8.2lbs/gallon add together 8.2 times 30= ?
80 gallons of water weighs about 668 pounds (about 8.35 pounds per gallon).
1 US gallon of water is approximately 8.35 pounds. -1 Imperial gallon is approximately 10 pounds.
One gallon of gasoline weighs 5 to 6 pounds depending on temperature. 2,000 pounds divided by 6 pounds per gallon gives 333 gallons.
You can't convert pounds (lbs) to gallons. Pounds is a measure of weight, gallons is a volume measure. The box weighs about 8½ pounds. It has a gallon bottle of water in it. One US gallon of pure water weighs about 8.35 pounds. One US gallon of gasoline weighs about 6.25 pounds (at 72°F). One US gallon of milk weighs about 8.6 pounds. One US gallon of mercury weighs about 113 pounds. Stay away from mercury! It is poisonous!
One US gallon of gasoline is approximately 6.3 pounds
Multiply gallons x 4.24 to get pounds. There are 4.24 pounds per gallon of LPG.
1 gallon = 8.35 lb