At least that's all I can think of to describe it. I recently purchased 4 rummynose tetras from my lfs
, for the first day everything was great. They were all schooling wonderfully with my existing rummynose and seemed quite happy. I purchased the fish last Friday and as of now, 4:30 Monday, only one remains and is currently knocking on deaths door. No changes in diet or anything else that I know of.
All of the effected fish became quite lethargic, and within about 6 to 8 hours of doing so developed white tails. Not a very good explanation I know but i really looked like the fish from about half way back had been cooked. Tail fins started to shrivel up into nothing, and white spots appeared on a few mouths. Water levels are very good pH about 7.4, ammonia 0ppm, nitrite probably around 0.5 ppm
, and nitrate around 20-40 ppm
. This is a 55 gallon tank which has been running for a week with water and filter media from two other tanks of mine. ( No problems in the other tanks at all) Currently running a Marineland Emperor 400 and housing 2 angels, 4 Bolivian rams, and 9 rummynose tetras. I've been changing water on my normal schedule of about 5-10 gallons every day to every other day. Today I did a 50% water change and added some aquarium salt.
Also, while removing one of the dead fish earlier today I noticed a strange spot around the stomach area of the fish and with the slightest pressure I gave my unlucky friend a squeeze. To my surprise his stomach burst open and many tiny white dots came from him. I'm not sure if this is relevant but figured I would include it.
Any ideas on how dangerous this is for my other fish, what it could have been and how to treat it will be much appreciated. Thanks.