Approaching my 2 year mark on a mixed SPS/LPS tank. All the SPS are doing fantastic, and I've had a few LPS issues in the past 2 years from what I believe now was too intense lighting. 2 weeks ago, I did adjust my lighting intensity down about 25% lower. In the past 5 days, my large birdsnest colony, (which grows so fast I have to trim it every month or two), started bleaching from the base up. The bleaching appears to be getting worse every day. I believe the remedy is to frag a healthy arm and start over, but i really would rather not do that. I wonder: do you think that the bottom part is bleaching just because the top is so full and no longer getting enough light? Using a magnifying glass, I do not see any sort of bugs or anything. I have not had any recent additions or changes to the tank, but 2 weeks ago I lost a trachy from perfectly healthy to completely bleached in 48 hrs out of nowhere (I think that lighting was too intense)
parameters are stable: Alk 10.5dkh, Cal 420, Mg 1440, Nitrate 4, Phos 0.03, Salinity 34.4, ph 8.0-8.3, tmp 78.8
Here's a pic:
parameters are stable: Alk 10.5dkh, Cal 420, Mg 1440, Nitrate 4, Phos 0.03, Salinity 34.4, ph 8.0-8.3, tmp 78.8
Here's a pic: