3a : to place or invest in such a manner as to make unavailable for other purposes their money was tied up in stocksb : to restrain from normal movement, operation, or progress traffic was tied up for miles. 4a : to keep busy was tied up in conference all dayb : to preempt the use of tied up the phone for an hour.
A 20-gallon tank is the minimum tank size for a reef or saltwater tank. Although it may be harder to maintain than a bigger tank, it is possible to create a saltwater tank using 20 gallons. Be mindful of the fish stocking to ensure that too many fish do not over-pollute the system.
Quick Answer. A standard scuba tank weighs between 28 and 34.4 pounds. The weight depends on the size of the tank and whether it is made of steel or aluminum. Steel scuba tanks weigh less than aluminum because the material is thinner. The diameter of a scuba tank is typically 7.25 inches.