Sump photoperiod

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Is it OK, to run my sump light 24/7 or does the macroalgae need to have a non-photoperiod (dark)
 
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From what I understand this is a good idea.
It helps balance fluctuations in PH and Calcium.
It can also help prevent Calurpa (can never spell that) going sexual.

I was actually thinking of doing this or at least having an opposite light period to the main tank.

Ross
 
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I run the reverse photoperiod, but I am not getting enough growth out of my Chaeto.

What if I run a photoperiod for say 18 hours, from 11h00 to 05h00, this would still give me my reverse cycle but give the macroalgae more energy to grow.
 
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put in stronger lights...I have 3xt5's 2x6500k and 1x20000k...cheteo goes mad...
 
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I saw a system running metal halides in the sump and the chaeto was so thick it has become a natural filter, really wicked
 
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just remmeber - the macro algea will only grow if there is excess NO2/No3/PO4 in the water
 
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Macro algea relies on photosynthesis in order to absorb nutrients which are present in the water column.With out light and just nutrients in the water,the macro algea will sadly die.
Sorry that doesn't really explain what it is doing with the light. Does it photosynthesises like a normal plant ?

If so then normal plants use the sun's energy to take Carbon out of CO2 and use it for growth etc. and expel O2 as a by product.
 

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