I'm not sure if you want to find out what brand/style of clearos you have, or if you want a way to tell what juice is in which tank with a simple glance. If you are looking to identify your clearo brand, I'm sorry I can't help without a pic.
On the other hand, if you want to know which juice is in what tank, I've been using mini colored rubber bands that I shanked from my daughters bracelet kit she got for the holidays. I take one color and put it on a juice bottle, then put the same color band on the tank with that juice. Since the bracelets are a huge trend right now, they are easy to find in tons of colors.
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