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.
Any smaller tank is only suitable until the axolotl is half the size of the tank. The tank can be 15 inches wide and deep, making the ideal tank 21 gallons (81 litres). A mesh top is best to prevent escape, or else make sure the tank is not completely full (one inch below the top would do).