You don t need to use Weight gainers or hard gainer, you can transform a low in fat protein in a weight gainer just by adding a banana in your blender, adds the carbs needed. One other thing that you should do is eat 6 meals a day. smaller portions more often. eat enough not to be hungry don t eat to be full and always eat before you get hungry . Honestly you have to know your body in order to be able to figure out what works for you. I normally walk at about 195lbs, i went down to about 175lbs in a couple of months, it only took me about 3 weeks to gain that weight back and its not fat that i put on. Try different things and you will figure out what works for you.