Hello everybody.
I am new here but I have been lurking around on this great forum for quite some time reading and reading and... reading.
After about ten years of planted tanks I am now planning my very first reef tank and, I must admit, my head spins with a million questions.
Is going to be a small tank, only 33 gallons - a cube of 50x50x50cm, on which I want to use Herbie's overflow design
I plan on using:-
- drains drilled into the back wall (with bulkheads)
- no overflow box
- strainers on the drain pipes for increased protection
- an Eheim Compact Plus return pump rated at 250 to 500gph (adjustable flow) in order to achieve a minimum 10x turnover of tank's volume through the sump.
The available rigid PVC pipe sizes here are 0.78", 0.98" and 1.26" OD (sorry but we use metric here - it's OD 20, 25 and 32mm - bigger sizes also available).
However the internal diameter of these pipes is only 0.67", 0.83" respectively 1.07" (sorry again for these dimensions).
Another problem would be that the ball valves (we do not have gate valves) for the 0.78 and 0.98 OD pipe has the same internal diameter of only 0.67" so IMHO not much benefit using 0.98" pipe.
My questions are
- what pipe size should I use for the drain and return
- how far apart the two drain bulkheads should be
Thanks beforehand for your help.
Gabriel