I have my returns coming through the bottom, I just have a pipe extend up to the water level to prevent the tank from draining. It's nice because you contain all the plumbing in the stand and can put the tank right against the wall.
If you've never drilled a tank before maybe try and find someone local who would be willing to help you out. Perhaps even lend you all the tools you need, or maybe just drill it for you for a small fee. As for spacing between holes usually the hole diameter can be used as a minimum but the more space the better. A perfect hole with a bulkhead won't really compromise strength but DIY techniques will result in chipping around the hole and chips can lead to cracks. This a risk you need to be aware of and have to be willing to take if you plan on drilling a stock tank.
|