You need to have 2 more pipes inside the overflow box to raise the water level way up & reduce the drop.
With 4 holes I would opt for the Bean Animal style drain & 1 return line.
If that doesn't work there are other options.
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250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.
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