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Sorry, I never really did any measurements, but on an estimate, I would say...the tank was 30cm high, the LED was 10-15cms from the surface, so on the safe side I'd say about 45cms.
The distance from the substrate I mean...10 to 15 cm should have been the distance from the water surface....how about from the substrate?
Sorry, I never really did any measurements, but on an estimate, I would say...the tank was 30cm high, the LED was 10-15cms from the surface, so on the safe side I'd say about 45cms.