Pale Cory's Dying?

[xamy_valox]

Yesterday I lost one of my Cory's. There was no fore warning, just looked in my tank and noticed it being blown about in the current of the filter. Could see nothing wrong with it, other than it looking a little pale which I put down to being dead.

I have just been looking in my tank again and notice that my other two skunk cories are also looking very pale and weird, like their eyes are very prominent. Not bulging in the sense of pop eye, but I think because the black on them has faded they are more orangey and noticeable. I am thinking I am probably going to lose these two during the night but what could it be?
My water stats are fine 0 ammonia, 0 nitrite, 5 nitrate, PH at 7.6. Did a water change yesterday but other than that nothing had changed in the tank.

The only thing I have noticed is my Cory's seem to be eating this fluffy stuff that has accumulated on my Redmoor wood. I did post a pic of the wood on here to ask if it should be removed but was assured it was perfectly safe and that fish enjoy eating it =\

Yesterday I lost one of my Cory's. There was no fore warning, just looked in my tank and noticed it being blown about in the current of the filter. Could see nothing wrong with it, other than it looking a little pale which I put down to being dead.

I have just been looking in my tank again and notice that my other two skunk cories are also looking very pale and weird, like their eyes are very prominent. Not bulging in the sense of pop eye, but I think because the black on them has faded they are more orangey and noticeable. I am thinking I am probably going to lose these two during the night but what could it be?
My water stats are fine 0 ammonia, 0 nitrite, 5 nitrate, PH at 7.6. Did a water change yesterday but other than that nothing had changed in the tank.

The only thing I have noticed is my Cory's seem to be eating this fluffy stuff that has accumulated on my Redmond wood. I did post a pic of the wood on here to ask if it should be removed but was assured it was perfectly safe and that fish enjoy eating it =\

 

[snazy]

What's the fluffy stuff they are eating? Where did you get your redmoor from in case it's leaching something toxic. White fungus/mold/fuzzy white stuff is normal on new driftwood and is normally harmless(I've had it too and my pleco ate it all) but some websites warn that it could be saprolegnia fungus which can actually attack an open wound and infect the fish. I am only mentioning it because you said the fish eat it but another possibility is that the wood is not dry enough and is leaching toxic sap.

Or, are you sure you didn't use a contaminated bucket for the water change or forgot to put dechlorinator or maybe not enough?
Or you hands had soap on them?

 

[xamy_valox]

Got the wood from my LFS, it is new and he did warn it would probably fuzz slightly, but to just be careful if I noticed any sap, which I haven't seen any evidence of.
I would liken the fuzz to the same kind you see on cheese thats going off, like a white fluff, no green or discolouring to it.
I only ever use the same bucket for my water changes so as not to contaminate and I am positive I used enough de-chlorinator as I always over dose it slightly.
Hands could possibly have had a trace of soap on them as I had washed them shortly before doing the water change, so perhaps?
Every other cory in the tank is fine.