Pulse Amplitude Modulation fluorometer and SPS

marsh · 04/06/2007, 01:06 PM

http://www.advancedaquarist.com/2007/3/aafeature1

Article about optimal lighting for SPS corals...to the species level. Goes beyond PAR and PUR. Thought discussion in this forum might be enlighting.

pjf · 04/06/2007, 08:33 PM

Riddleâ€™s recent article complements a previous one, entitled â€œToo Much Light!â€ (http://advancedaquarist.com/issues/july2004/feature.htm).

Apparently, many corals inhabit shallow waters because they can tolerate the intense mid-day sun, not because they are dependent on it. Although they can be photoinhibited at mid-day, they can resume photosynthesis in the lesser afternoon light.

There are two lessons that Iâ€™ve learned from these articles. First, we need not replicate the intensity of the noon sun for our aquarium corals to thrive. Light intensity between the compensation and saturation points will suffice. Second, a modest two-tier lighting scheme may work quite well. At mid-day, metal halides can illuminate the depths of the aquarium. If the corals at the top of the aquarium are photoinhibited by the metal halides, these corals can resume photosynthesis with the lesser fluorescent lighting at dusk.

04/06/2007, 01:06 PM	#1
marsh Registered Member Join Date: Mar 2006 Location: Arkansas Posts: 404	Pulse Amplitude Modulation fluorometer and SPS http://www.advancedaquarist.com/2007/3/aafeature1 Article about optimal lighting for SPS corals...to the species level. Goes beyond PAR and PUR. Thought discussion in this forum might be enlighting.

04/06/2007, 08:33 PM	#2
pjf Premium Member Join Date: May 2005 Location: Colorado Posts: 2,954	Tolerance, not Dependence Riddleâ€™s recent article complements a previous one, entitled â€œToo Much Light!â€ (http://advancedaquarist.com/issues/july2004/feature.htm). Apparently, many corals inhabit shallow waters because they can tolerate the intense mid-day sun, not because they are dependent on it. Although they can be photoinhibited at mid-day, they can resume photosynthesis in the lesser afternoon light. There are two lessons that Iâ€™ve learned from these articles. First, we need not replicate the intensity of the noon sun for our aquarium corals to thrive. Light intensity between the compensation and saturation points will suffice. Second, a modest two-tier lighting scheme may work quite well. At mid-day, metal halides can illuminate the depths of the aquarium. If the corals at the top of the aquarium are photoinhibited by the metal halides, these corals can resume photosynthesis with the lesser fluorescent lighting at dusk.