I finally found a good deal on a 55 gal tank. I got the tank, stand, hob filter for $100. My question is about filtration. Some pet stores say I should put in an undergravel filter and some say that it is old school and not used anymore. So now I turn to you. I have heard they can actually be bad because bacteria gets under them. I don't mind getting one, cause they are not too expensive, but I also don't want to waste money if they aren't needed.
ss
ss