need help ASAP !!!

[redheadedfishkeeper]

it looks like i have gnats in my tank! what are they , are the dangerous to my fish and snails? and how do i get rid of them please help

 

[camber1981]

Better description may help.... Are they floating at the top? Sinking to the bottom? Any pictures?

 

[redheadedfishkeeper]

no pics sorry .. there in my gravel and attacking my onion and lily bulb.. tanish body with about 2 or 3 black stripes going from left to right...