sps turning brown after changing lights and tank

[scunfcu]

Most of my SPS are turning brown or losing some its colors, after I moved them from 20g with 150W HQI 14,000k to a 75g using T5 lighting! I am worry, its been about 2 days and they have still not color up. New tank is 75g. I didn't check water parameters yet, but 75g has all new saltwater. Salinity is about 1.21. MY PH,Cal, alk should all be fine because this is new tank and I have not add anything ( dosing..eating ) to the water.

Could it be that they are so use to MH lighting? The sps is place at the bottom of the tank, some are on the rocks.

75g is 48x18x20 with 4x54 T5 TX5 lighting, so my lighting should be suffix for them. The height of the tank should be fine also.

[Leonardo's Reef]

The move and change in light can be a combination of factors that cause stress. Browning and color-loss can be the result of stress. If the polyp extention is good, and they show no signs of STN or RTN I would not worry.

Leonardo

[PSam]

I would watch that SG. If you meant 1.021, that's pretty low, and if it's typed correctly, 1.210, that's kind of high.

[scunfcu]

Sorry, I meant to say 1.022 and not 1.20. I'll monitor the rest of the water parameter also.

[Canarygirl]

sorry if I'm highjacking but on the subject of stressed corals....


how long can a coral live without extending its polyps? I have a turaki that's been struggling and I haven't seen it's polyps in about 10 days. Wondering how long it can go on this way.

If the polyp extention is good, and they show no signs of STN or RTN I would not worry.

[jade2122]

I had a pink milli that after some salt and alk issues didn't see its polyps for at least a month. is doing great now and getting some cool new color to it.

[jade2122]

i would also say to this yes, salt too low, second sps should be in upper part of your tank. 4 t-5's isn't much for a 75 and especially if the corals are at the bottom. you should expect some color loss when changing tanks. also if your new saltwater in 75 didn't exactly match your old tank there is the stress issue there too.