probably 75 dollars
Two Hydor Koralia 3 Power heads are needed to keep the proper current flow in a 75 gal. saltwater reef tank.
Empty, probably around 30-50 pounds (guessing) -- Full with ONLY water, it will weigh about 850 pounds. Full with water, gravel, and decorations, it will weigh more.
The SpG of a 75% Phosphoric Acid Solution @ 20C is 1.579.SO ...1.579 X (8.33 lb/gal of water) = 13.2 lb/gal.
A glass would typically weigh around 75 grams, not 75 kilograms.
The flash point of LPG (liquefied petroleum gas) is approximately -104 degrees Fahrenheit (-75 degrees Celsius). This is the temperature at which LPG will produce enough vapor to ignite briefly upon exposure to a flame or spark.
75 Liters 19.8 US gal 16.5 Imp gal
Only baby RES can be housed in a tank that small. But, for many you can keep in there, I'd say two baby RES. But, do realize that you will need a bigger tank, because a full grown male will need a 75 gal, and a full grown female will need at least a 120 gal. If you can't afford this you can always get a stock tank or a plastic container bigger than 55 gallons.
they weigh about 75-90 pounds.
It may weigh about 75 pounds
75
closer to 75 grams