Yes liquid. I make small batches 20ml at 2.5% RU. It's been regularly suggested to mix at 5% RU. But I suggest starting low. After 3 months you can always mix it stronger. It also depends on how much product you use. If you use 2 ml at a time your still going to get the same mg of RU as you would of if you mixed it at 5%.Okay mate is that liquid form? I was thinking of including ru, is 0.5 grams the normal amount to add. And is this all included on the website?