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That’s my main problem. I can’t find a reliable source for readings online and I don’t have a par meter. How do you think I should go about this? Just low at first and see how coral respond?Honestly...you are looking at the wrong measurement....You need to know is the par output per the intensity.
Honestly its going to be really hard with out one. You cant use your eyes to measure intensity of the light..... You really have 3 options.That’s my main problem. I can’t find a reliable source for readings online and I don’t have a par meter. How do you think I should go about this? Just low at first and see how coral respond?

