i don't think it's too much , although i firmly believe you could achieve the same results with all 250 's or a 400 in the middle. i run 2 250's and a 400 on a 225 gal sps tank[ 30'' in depth ] , and in general am quite pleased with the colors , growth and health of my corals , as well as my electrical bill is not thru the roof . Heat will also surely be an issue with 3 - 400's
hth -Russ
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