i just buy it a 175 watt electronic metal halide pendant lighting fixture whit a 10,000k light bulb whit a automatic brighteening and dimming control simulating natural sunrise and sunset also in the same 75 gal i got a 36" single lamp fixture 96 watt 50/50. my question is i can keep hard corals and clamps?? i just wane use the metal haline in one side and in the mitle the 36"
If you double that you might be ok.I used to have 2 X175's and 2 X65 PC's over my 75..but to tell you the truth I really was'nt happy with the color or growth until I went up to 2 X250's and 4 X110 super actinic VHO's.JMO
I'd stick with the 10K over the 20K..I'm sure you can still keep any LPS and maybe a few sps under that bulb any clams going to have to get under the bulb and up a little higher in the tank.
You can keep all the clamps you want just make sure their the plastic ones