I like the white brighter look myself so i went with 14k the 20k has a much more blue look to it ..When i had 20k bulbs my sps didnt really grow to much at all even as close to the top i could put them nothing just stayed alive ..changed to 14k and wow what a difference with the color and growth i have sps in the mid level growing good now
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150 mixed reef 14 fish 4 shrimp 50+ snails
55 sump long spine urchin 20 snails
Shawn
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