In the past when cleaning my rena filter I found two baby cat fish in the gunk that lies on the bottom of the filter. Ever since I check closley when emptying out the bottom of the filter. Today I saw something moving and was able to get it out and put in a glass of aquarium water. It is some kind of bug. It has 6 legs that are speckled. a little over a 1/4 inch long. Two eyes that sit on the side of its head. Tan in color and when viewing from the side its backend kind of sweeps up. It moves very fast when bothered. Kind of darts. Best I can describe it. Anyone know what it might be and where it might have came from? 
