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Old 06/04/2011, 06:47 AM   #2
salty joe
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Join Date: Oct 2002
Location: medina, ohio
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I think photoinhibition would be interesting to look at. Everybody seems to run their scrubber lit for 18 hr a day. Maybe in some setups this is ideal. I suspect that with intensely lit scrubbers this is not the case. An O2 senser plumbed to the scrubber drain would reveal what is going on.

I think two scrubbers where only one is lit at a time would be the most efficient use of electricity. Use the O2 senser to determine when photoinhibition begins and set a light timer accordingly. So when photoinhibition begins the light goes out on that scubber and the other scrubber gets lit up. On the runup to photoinhibition, growth is fantastic, then growth drops like a rock, no matter how much light (electricity) you throw at it.

I base my opinion on this link

It is a study of Cheato, but it is mentioned that most marine algae behave in a similar manner.

Time to roll the dice.
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