I recently hooked up a frag tank that is plumbed into my main system. It is a standard 20 gallon tank with an extra powerhead installed for more flow. I am looking for a couple of small fish and/or invertebrates that can help with a bit of algae growing on the plugs and for general maintenance. I have seen quite a few frag tanks with tangs, but this tank is just too small. What are your favorite frag tank fish?
