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.
Get a large enough tank. The minimum tank size for one goldfish is 10-15 US gallons (56.7 liters)(Remember, they grow to about 10-12 inches (25.5-30.5 centimeters), and sometimes over!) and you will need to add 10 U.S. gallons (37.8 liters) onto that for each additional goldfish.