Give it a feed of equal parts flour and water and mix until dissolved. (theclevercarrot.com)
You're welcome to try making a poolish using equal parts flour and water and mixing them together ahead of time. (kingarthurflour.com)
Honestly, you can never fully predict how your starter will perform, but common sense tells me that yours should work perfectly fine as long as it's fed at 100 % hydration (equal parts flour + water by weight). (theclevercarrot.com)