This does not necessarily depend on what kind of jelly you want. Generally, the ratio of water to agar is 1:8, that is, 1 tael of agar: 4 pounds of water!

It's actually hard to get to the point of jelly with just agar! Even if it's well made, you won't be able to get to the big kind of Q with just agar! I suggest that you do jelly with jelly powder, it is more complex ingredients inside, by carrageenan, sodium alginate and other gums, molding better, large supermarkets will be sold!