well to start with why would you make it 20mg/ml. thats a low dose. 50mg or higher is the preferred dose. 5gs plus 45ml or so will make 50ml at 100mg/ml. 1/2 a ml will be 50mg. good place to start. unless you are making it for a woman. no it will not stay in solution, it will a suspension. I thought you wanted an injectatable. if you inject that you will regret it. what is it that you want to accomplish? put on size, get stronger, lean out or what? do you have dbol power? do you want injectable or oral? you seem confused a little. good luck