[Kronk]

Hello i just bought a little blenny form J&L yesturday he is very small less than 2", and has taken up residence on my aquaclear 50 powerhead... odd choice of home but i have never seen it so clean...i have had a midas blenny before but apparently these guys ONLY eats algae ? does this sound right? if so do i need to feed him some kind of special food

Thanks,
Ken