Intensity reduction and algae
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Old 12-04-2014, 10:30 AM   #1
lee739
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Intensity reduction and algae


I have LED lights in a hood, they are probably an inch over the water surface. Manufacturer claims 56PAR at 40cm.
I am getting some green hair algae in the upper zones, down to maybe 3-4" depth. If the lights were suspended, I'd hoist them up 3-4" and hopefully help the problem.
Current light program - 7hr full intensity, with 2hr sunrise/sunset either side.
I can dial down the intensity with a controller - what % do people feel would do similar??

Other details:
CO2 injected - pH 6.72, KH 3.5
EI ferts, full dose (daily).
50% w/c weekly minimum, usually a second 40% and mulm/filter clean out as well.

Last edited by lee739; 12-04-2014 at 07:44 PM.. Reason: grammar
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Old 12-04-2014, 01:22 PM   #2
philipraposo1982
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Your light doesn't seem that bad if your injecting co2. But raising your lighting will most definitely help. Up the co2 if your can do it safely as well.
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Old 12-04-2014, 05:03 PM   #3
Zippos
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Since you're asking, here's what I would try if it were me:

Leave the light at its current height
Change from 7 hrs full and 2/2 to 4 hrs full and 2/2
See if you can raise your CO2 level some without adversely affecting any fauna
Give it about two weeks to see if there are any changes
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