I cant seem to find a thread that recommends brands. I need a second and soon thrid uth and was wondering who has problems and what problems you had? i have been using a zoo-med for my 30 gal glass and it's working great with my light dimmer thing. i am setting up 2 more 30 gal glass and will need 2 mote uth. i found online deals for exo-terra and zoo-med. i also found a brand called t-rex. so, what's your beef?