PAR throughout aquarium? - The Planted Tank Forum

 
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post #1 of 4 (permalink) Old 02-02-2013, 01:57 PM Thread Starter
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PAR throughout aquarium?

I have a 20g long. pressurized co2. rootmedic tabs. macro & micro dosing. not heavily planted. Just an ozelot sword and vals for now. 2xt5ho Catalina fixture suspended 27'' above substrate, which I previously had it at 18" above substrate a week ago. Ive read hoppys chart, excellent job. However I am having co2 issues at the moment, very slow/stunted/disformed growth. I cannot raise those levels anymore or fish suffer. I am wondering if I should use hoppys chart to aim for a certain par at the substrate, at the top of the tank, in the middle.

If you do it fast enough then you will have time to do it again
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post #2 of 4 (permalink) Old 02-02-2013, 04:08 PM
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post a photo please
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post #3 of 4 (permalink) Old 02-02-2013, 08:54 PM
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The charts are all based on PAR at the substrate. For low light, that means around 20-30 micromols of PAR at the substrate. The higher in the tank you go, the higher the PAR, and near the ends of the tank, the PAR might be a bit lower. We can't independently set the lighting for a specific PAR at more than one place in the tank, so I chose the substrate, near the middle of the tank, as the place to measure to rate lights.

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post #4 of 4 (permalink) Old 02-02-2013, 10:10 PM Thread Starter
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Cool. thanks for the quick response. I plan on posting pics when i get some free time. hard to do with 2 jobs and a family if u know what i mean

If you do it fast enough then you will have time to do it again
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