A Shallow sps reef

[Ryanerickson]

So I did some par testing I had 2 difference apogee usb models
Sq 420 vs the sq520
Sq520 is more money and says it can do led better on the website.

Vs



Pics are in order from one to nine
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Overall the sq 520 shows a higher par on all tests but the biggest difference was under the halide not the led as I was expecting.