Stephen Pushak wrote about a dark period
Stephen mentioned 4 (four ! ) dark days as an experiment.
I am afraid your plants cannot sustain many of such dark
From Dennerle books I subtracted an other sort of "dark
It's on a daily base:
- mount a proper amount/sort of light
- light on for 4 hours
- light off for 2-4 hours (2 hrs. seems to be too little..)
- light on for 6-8 hours
Total:10-12 hours of light within a period of 12-16 hours.
The more "basic" algae should not be able to adapt to this
scheme; the aquatic plants should (It was tested!).
Your plants should NOT react to this, or they might suffer
too much (I think they did in the experiment you described)!