Can coral recieve too much light?

[soheix]

my coral are under MH from 11-7pm then 7-11pm they get some fluorscent light from the living room lighting. Would this much lighting case problem for my tank, since lately the living room light has been on more. Ive started to notice my mushroom melting. my parameters are all good.
0 nitrate, nitrite, ammonia. 480 calcium, 8 alkanity at 1.0255 salinty. However my temperature has been fluxing it been getting hot here. normally 78F but on some day it get as hot as 83F+

 

[soheix]

I also want to add my other corals are doing fine, but for some reason my mushroom has started to melt like this... In addition on the bottom side of that rock there these white tube like things growing out of it.

Ive had these mushroom for the half a year and started with 3 and multiply to 15 but these pass few days they are all shrivel up and spewing slime. I also don't dose anytime except run carbon. Any idea whats going on?

So im still guessing it overexposer on light since we are college student and work late night in the living room with out fluouscent on.

 

[zear0]

What kind of mushroom is it? A picture would be very helpful. I would guess its the temperature fluctuations or something other than your lighting.

It is possible to light corals too much...

Corals live at many different depths in the ocean. And their lighting needs can be determined based on this. A coral that lives deeper needs less light and may be harmed if you try to set it near the surface of your tank.

It is possible to "burn" corals with light...

Usually, this occurs when people upgrade to a more intense fixture and don't give the livestock time to adapt to it. Many people will reduce the photocycle at first or raise the lights up from the tank and slowly move them closer. You may need to move corals into deeper locations if you increase your lighting intensity.

MH lamps can also cause problems for you if you leave them on during a water change. The water level goes down and the intensity of the lighting increases dramatically.

I wouldn't think the room's regular flourescent lights would impact it too much. Especially if they are several feet away from the tank and not directly above it. Inches make alot of difference with respect to how far a light penetrates your tank water. Is your tank regular glass? IF so, the glass walls of the tank will reflect much of the intensity as well.

 

[soheix]

My tank is made of acryic and the fluorscent light is 5ft right above on the back wall. So when the MH light is out it looks like dawn lighting. I'll try to post a picture as soon as possible. Also I had the MH lighting for a whole half a year so it has be thriving well. Hopefully they won't die on me.

 

[ChrisRD]

Hello and :welcome:

IMO the ambient room lighting is not the issue. Have you changed or added anything to the system lately?