- Joined
- Oct 3, 2015
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Interesting problem. It has nothing to do with the quality of the lighting though. I've had my 2 xr15prog4s over a 36"w x ??? (Long) 30gal aquarium for 2 weeks now ramped up from 20-30% so far using the standard coral growth setting for 10 hrs / day and the corals in my tank have, I can't put it any other way than "exploded back to life". Very happy with results so far. I'll report back in another month or so. Good luck with yours!

