mounting

People will often look at my tanks and ask me why my heaters are positioned "wrong." I put them in the tanks horizontally, not vertically. Well, I just got an object lesson on why this is the way the heater should be mounted. I have a 29-gallon tank that I usually keep the water level an...

We have a "paper" background on the 150 and, after doing some research, mounted it using mineral oil. It looked great at first, but 2 weeks in and it is NOT sticking anymore. What do others recommend for mounting a background on a tank?