Pharmaceutical grade dry agar for making plates and slants. 2 ounces will make up approximately 4000 ml of liquid agar.
For lab use, use 12 grams to make 1 liter of solid agar, which is way more than even a big laboratory uses. It takes a very accurate scale to measure that out. Dissolve the agar slowly in the water or wort for a few minutes. Gently heat until a boil is achieved. Be very careful of not boiling over, if you do it's best to throw that boil out as your water to agar ratio is off and you will not get a good medium. Boil for a few minutes and then divide out to sterilize.
2 ounce package