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I have a scubacube 270 (65cm waterheight) with the mitras 6100hv at 20cm over the water surface with an acrylic cover on top of the tank. What would you advise for me? High output or heigh efficiency, and at what percentage? I run the standard illumination programm.
with SPS high output
Hm, I have them since more than a year at 100% high efficience at a water hight of 75cm. All is growing, even milepora on the bottom.
Then I do not understand the question, but when everything grows, why do you want to invest more energy.
More light, more growth, too much light problems
I do not think that there is too much light at high output. You can even careful to control