Sump grow light

[JammyBirch]

I have a refugium in one half of my sump, with lower flow. I'd like to grow cheato algae in there at some point and was searching on the light schedule for that.

I had heard that running it opposite the DT light schedule would keep photosynthesis going 24 hrs a day, could i just run the grow light 24 hr's a day?

i did some searching but didn't find much about grow light schedules for sumps.

Let me know what you think.

 

[reelredfish]

I have done both ran them 24 hours a day and others I have run opposite of the display...this is supposed to help keep PH stable.

However my best growth has come from running them 24 hours a day.

On my new 180 in wall build I am trying the opposite time once again to see how it will work out.

 

[thegrun]

Long term you are better off giving the refugium a dark photo-period. I run mine on for 17 hours, off during the DT peak lighting period.

 

[Wryknow]

I've done both 24 hour and counter-cycle and am not sold on one way being better than the other. Try whatever seems right to you and see how it goes.

 

[m0nkie]

does it make a difference for the pods in the fuge? do they need night time?

 

[Wryknow]

They chaeto was crawling with pods both ways. Maybe the composition would be altered with a day/night shift but I can't think of any reason that it would be important to us.

 

[1987]

I run 18 on 6 hours off. Grows very well

 

[Sk8r]

I use a 6500 k cfl floodlight in an ordinary clipon shop light fixture, grows like mad, lit 24/7