Made a yeast starter with wyeast ringwood ale yeast and it seems to be lacking activity. I do not have a stir plate. Usually I see some krausen and can smell it but neither seems to be happening. I have not used this yeast before. It has been about 20 hours and I'm gonna put it in the fridge so I can decant before I pitch tomorrow. I do have backup dry yeast if I decide not to use it. Any thoughts?