I prefer using extra light DME. A 3 lb bag makes a bunch. Easier too. For those who dont know there is an easy way to remember how much to use. Weight in grams per volume in 100 millileters equals percentages that equate to ºplato. Times that by 4 for specific gravity. 5g per 100ml equals 5% equals 5ºP equals 1.020
I normaly half fill a 2qt jar with hot water, stir in my DME and a pinch of nutrients with a wisk, then fill to the 2000ml mark. You end up with break material that way, but just pour carefully. If you dont want break, boil the DME and chill so it doesn't crack the jars, then fill by pouring through a coffee filter.