Lethargic Oranda

In message , Enigma Webmaster
writes
We've purchased a tank some 4 weeks ago and settled 2 Blue Orandas in after
a week. They have been quite happy. Now one of them has a very fine white
'fluffy' stuff on his scales and sits at the bottom of the tank and does
nothing. The other fish is active. We've changed the water regularly and
done all the tests Ph (7.2) Nitrites(2ppm), Ammonia(0ppm) and nitrates
(40ppm) and still can't seem to find out what is wrong. We've stopped
feeding them this morning as it would appear that we may have been feeding
them a little too much.

Can someone possibly offer a suggestion as to what is wrong and how to
correct it.

if you have nitrites showing then your tank is still cycling - your
nitrates aren't low, either. Neither of these things will be helping
your unhappy fish :-(

20-25% water changes daily will help sort this out - keep testing and if
nitrates or nitrites go up you might want to change out more of the
water. Water quality will go a long way towards getting a fish better.

White fluff could be columnaris, which is bacterial, or actual fungus -
I'm not sure where you are or what meds are available to you. My
personal preference is for water changes.

(how big is your tank, btw?)

hope this helps.

--
sophie