PAR Readings 75 Gallon Tank 

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sgh360

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Today i got PAR readings on my Tank, and here what they are

Bottom of the Tank: 48

Middle of the Tank: 60

Below the Water Line: 115

Above the Water: 150


My Tank is 20in Deep. Is there any Plants that can be used on the bottom of the Tank? if so what are their names?
 

addicted_ind

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hello,
kindly refer
 
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sgh360

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Thats for corals. What about Freshwater plants
 

addicted_ind

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hello sgh360,
here are some refrences i googled it for you,personally dnt know much hope u understand.

Abstract
Instruments now in common use among biologists for measuring underwater photosynthetically available radiation (PAR) were compared as part of the Group on Aquatic Primary Production workshop. The effect of differences in spectral response (narrow versus broad wavebands) and collecting properties (cosine versus scalar) on measurements of vertical (diffuse) attenuation coefficient (ε) were tested. As instruments measuring spectral quality can be expensive a low-cost manual interference-band-filter photometer is described and compared with a scanning spectroradiometer. In Bodensee there was a progressive narrowing of the spectral waveband with depth, so that by 15 m nearly 75% of the total quanta were between 525 and 575 nm. Therefore values of ε for PAR, measured with broad waveband sensors, decreased with depth. With narrow waveband sensors values of ε were constant with depth. Attenuation was similar with both scalar and cosine instruments. However, comparisons of absolute values were difficult because of incorrect calibrations. It is recommended that the calibration of scalar instruments should be more precisely defined, and that the intrinsic depth-variability of ε for PAR should not be neglected when interpreting measurements.






tc.hope some1 will reply you soon.
 
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