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Apogee Instruments MQ-510 Underwater Full-Spectrum Quantum PAR Meter - Digital Light Meter for Aquarium Lighting & Aquarium Plant Care: Amazon.com: Industrial & Scientific
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MQ-210X Underwater Quantum (PAR) Meter | Apogee Instruments
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Amazon.com : Apogee Underwater Quantum Light Par Meter MQ-210 : Electronics
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