If I did my math correctly I believe that you would need 150 teaspoons
That is approximately 317.465 teaspoons
That depends entirely on what is being measured as teaspoons is a measure of volume whereas milligrams is a measure of weight. For example 1500 mg of styrofoam would weigh far less than 1500 mg of sand.
1500 imperial gallons is 6819.14 liters.
1500 liters = 396.3 US gallons = 330.0 imperial gallons
1500 US gallons = 200.52 cubic feet
187.5 gallons
For which one? 1500, 2500? I believe the 1500 holds 26 gallons and the 2500 is 31 gallons.
1250 to 1500 gallons.
0.3962581 US gallons.
1500/28 = 53.57 gallons.
1 teaspoon Loom
30 gallons