thaitopher
New member
Thinking about adding torch, frogspawn, star polyps to my 20 gallon nano. What are the general PAR requirements for these guys?
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Euphyllia can handle anything from low to high light(if acclimated slowly). Gentle flow is more important for them. What lighting do you have?
I have found various sources of data on this and it's not unusual for them to disagree a bit. Take a look at Vivid aquariums, he shares some general PAR numbers for his coral. That should give you a general target.
From my experience and what I read on RC it seems there is a rather forgiving range of lighting that many LPS will tolerate.
Your PAR numbers will handle the corals you've listed.
I've read studies on different photo periods for corals and while it would obviously be different between species, it seems that their photo receptors have a limit to the amount of light they will absorb. I forget what they found the mean time frame to be but I think it was in the 4-5 hr range. So, extending the photo period by leaving your lights on longer would most likely not have the effects you desire. Most algaes on the other hand, would love an extended photo period.
Here are the par levels on my 90 running a reef breeders photon 48 at 60 pct blue channel / 40 pct white channel.
View attachment 370083
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28how deep is your 90? I have a 120 long (60x18x26 tall) and have had a godawful time finding the right channel intensities.