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.
The main one is sodium chloride, often just called salt. Most seawater has about 35g (7 teaspoons) of salt in every 1000g (about a litre2) of water. This doesnât sound very much, but it would take three 6m shipping containers full of salt to make an Olympic-size swimming pool as salty as the sea.