I'm putting in one metal halide(175 w) single end bulb with 2 flor actinics in my tank. I can only put in one bulb, what k would be best as to the health and growth of sps?
You'll get a variety of opinions, but with actinics, I prefer 10,000K MH. It's the best balance of PAR (photosynthetically active radiation) and color IME.