Deresa bleaching

[silas k]

I have hav a t. deresa for 4-5 months now and is has been doing fine .. now i just find out that it is turning white in the middle .. what should i do .. ?? :confused:

[a4twenty]

is this in the 75l tank with the 150MH light?


how old is the bulb and what kelvin is it?

can you post a picture?

[silas k]

yes ? its approx 15 gallon

[a4twenty]

<a href=showthread.php?s=&postid=11404790#post11404790 target=_blank>Originally posted</a> by a4twenty

how old is the bulb and what kelvin is it?

can you post a picture?

the kelvin is the color temp ( ie 10k, 15k, 20k )

[silas k]

the bulb is 14000 kelvin sry i didn't see you asked that and its about 6 months old.

i can post a picture tomorrow but theres really nothing to see it has its normal skin texture ( if u know what i mean) its just white ? ?

[a4twenty]

how deep is the tank and where is the clam?

that light in what i presume is a fairly shallow tank should be fine. is there a chance that he was shocked by to much light to fast? ( moving from bad lighting ) or is being shaded by something?

[mbbuna]

photos always help

[silas k]

the tank is 40 cm tall. and its not shaded and ive had it for 5 month and its just started to bleach now :( .. its on the sandbed..
i will get a photo when it opens up enough to see it properly

[a4twenty]

there are other reasons for bleaching, they just aren't very common in our tanks. a picture will hopefully tell the story.

[silas k]

ill see if i can take one but its not fully opened so i can't really see it on a camera.

[jmaneyapanda]

What is the temperature swing? 15 gallon can have a big swing with a MH over it. Also, how about salinity?

[silas k]

the temperature swing is maybe 3 celsius from mid day - night .. and the salinity swing is maybe 1-2 over 2 days.