what would bleach out a mushroom?

[kolosy]

my mushroom has been doing well, but i noticed that a few of the heads have had their polyps turn white. the tips are still green on some, but it's just weird.

my params are where they need to be

nh4: 0
no2: 0
no3: 0
ca: 420ppm
mg: 1280ppm
alk: 9dKh

here's what they were like when i first got 'em about a month ago:

lfs told me i need iodine. haven't tested for it, haven't supplemented it. could this be it?

 

[padi200]

how about the tank temp? Is it getting too hot?

 

[padi200]

proteim skimmers supposedly remove iodine from the tank, so if you have one and never added or checked it, that is possible.

Most people add it and don't check it. I think it is one of the more expensive test kits

 

[kfisc]

One guess from looking at the photo is that they were struggling when you bought them. The others look pretty healthy. My own experience is that if alk/ca and magnesium are in balance, you won't need to dose iodine; I've certainly had LFS workers try to sell me on dosing iodine- they've got tons of additives to sell.

Also- what light intensity do you have? They may be getting a bit blasted on top?

 

[Sk8r]

salt creep (solidified salt from splash zone) can do that if it falls on them. It's like a burn. certain chemicals can, if they hit them: dissolve everything in a glass of tank water before adding and watch out for specimens. Fuzzy shrooms also can light-burn.

 

[sassafrass]

Like sk8r said looks like too much light to me ,have you changed anything lately?

 

[Tswifty]

+3 on too much light.

 

[kolosy]

they're under a 2x150mh. it's a 20" tank, with the lights about 8" above the water surface. should i move 'em further down?

tank temp varies between 78 and 80.

 

[vader88]

<a href=showthread.php?s=&postid=13035113#post13035113 target=_blank>Originally posted</a> by kolosy
they're under a 2x150mh. it's a 20" tank, with the lights about 8" above the water surface. should i move 'em further down?

tank temp varies between 78 and 80.

I'd definitely move them down to about mid level

 

[kolosy]

well they're about 15" down, with maybe another 5" to go. the only thing i can do at this point is put 'em on the sandbed.

 

[centipede]

Almost looks like a different kind of shroom to me, since they were a different color when you got them. They're probably a different color morph that is more sensitive to bright light.

 

[TurboRobert]

My friend had the same problem and they melted afterwards. They were at the bottom of his tank. I don't think its light.