photo periods

[Oscar]

Originally Posted by Trigger Man

so maybe the lighting period has to be varied here and there, just like how it happens in nature with seasons.

Yes, very interesting discussion. The photo period for corals, since most are found very close to the equator should be relatively constant through the year, not seasonal.

But...what will vary is intensity from day to day to account for cloud free, cloudy and rainy days.

Currently I have been running actinic 12 hours, hallide 10 hours, moonlights, 4 hours. Some of my corals seem to be losing a bit of colour.

So here is what I am thinking of shifting to in my photoperiod:

Actinincs: 9.5 hrs per day
Moons: 4 hrs per day
Hallide: Sat/Sun: 7.5 hrs
Monday: 5.5 hours
Tuesday: 3.5 hours
Wed: 0 hours
Thursday: 3.5 hours
Friday: 5.5 hours

The additional benefits are less chance for the tank to overheat, less evaporation and fewer algae issues.

Thoughts?