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02/10/2018, 08:30 PM
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Registered Member
Join Date: Jul 2009
Location: USA
Posts: 402
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Apex pmk par - ai hydra 52 & 26
So I bought a Apex PMK Par meter for my 40g which is 15"W x 36" L x 16" H. My lights are a good 12" above the tank. I had to crank up all LED to 100% to get 197-206 on the sanded slightly to the side but not directly under the AI-52. Does this sound right or are my lights getting old - I bought them new around 2008-2009. And, how long would it be best to run these LEDs at 100%. This tank is currently only FOWLR but I am working my way back to some SPS.
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