my project this weekend is to drill, plumb and set up a sump / refugium. Mark has convinced me to drill my tank. I think I have that covered. However, i have a few questions as usual.
I have a 30 gallon tank and a 15 gallon sump.
what size hole should i drill?
how do i prevent my substrate from draining? (screen?)
how many holes do I need?
where is the ideal location for the holes? (bottom, back?)
what size pvc should i use?
should i brace the holes in any way to prevent cracking?
Im assuming a shut off valve should be used?
anything out of the ordinary im forgeting?
thanks guys