100 gallon 'Dutch' tank controlled by a profilux III

dutchy

Plant Guru Team
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Jul 6, 2009
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You need to measure at substrate level as close to the middle of the tank as you can get. At the front window it's always a bit less, like 5 to 10 micromols. So if you have 75 at the front window, you could have somethin like 80 to 85 on the middle. That's still a lot.

regards,
dutchy