Halide question as well.

[ghostface]

I am in the process of switching tanks from A 90 gal to A 120.I currently have 2 175,10k bulbs with 2 55 watt actinics.I already know that this setup will not do for the 120.I was thinking about adding I 250 watt20k reefsun fixture.The tank is mostly soft and stony corals with A few SPS corals.Do you guys agree or disagree with this setup.

[Flatlander]

If your thinking of adding a 250, with a 175 on each side, for a 4ft. tank, I would say that would be good. I run a 400/center, plus a 175 on each side.

The only downside, as compared wit ha pair of 250,s or 400,s on a 4ft. tank, is bulb replacement cost.