Blood on lower gills and finns? help?

[jaajaa40]

I hope to one day be able to respond to questions on AA, but as of now I am still a newbe and really need the help I have been given so far, it has been great.

I though I was up and running with my tank for about 6 monts, I was loosing a neon or small fish here and there but thought nothing of it. Then I lost about 5 fish in the last week, leaving me with nothing. All fish were from a local pet store at I do have some confidence in.

Well fish are fine one day and then dead with no apparent body signs the next. Actually I fed one of my last Angel fish, he looked and was eating fine, then I came back 4 hours later and found him dead. And he still had good color and no signs on this body, it looked fine.

Last night I finally found something I could ask a question about. One of my last cory cats was dying and I picked him up to take a look. He had red on one of his finns, right where the fin attaches to the body. Also he had red on his lower gills. I held the fish in a paper towel and the towel got red. I am assuming he was bleeding.

I hope the little guy told me was was wrong. If someone could give me help please it would be great. Thanks.

 

[jaajaa40]

Required info I missed is added here, best I could. I would be cool is some could give me a clue. The LPS said some type of bacterial infection, sold me some anabiotic to add to the tank. Do you agree? See problem below.

1~What type of fish is afflicted?
4 neon Tetras, 2 sward tails, 2 Angel fish, 2 Cory Cats.
2~What are your tank parameters?
Sorry no exact values, the LPS tested the water twice last week and said it was about perfect.
>>> I would not mind getting into a test kit, what would someone recommend that is cost effective and good enough for simple tropical fish? ?????????????
3~ How large is the tank?
64 Gallon
How long has the tank been set up?
6 months
4~What type of filtration are you using?
Emperor with the two sides
5~How many fish are in the tank?
There were about 8 fish, now 2
6~When is the last time you did a water change and vacuum the gravel?
Every other week I change 10 gallons
7~How long have you had the fish?
The fish were all at least in the tank for 4 moths or so, the last two added were sword tails, they have been in for 3 weeks, I add them to the tank slowly, 15min float, 15min float with water from my tank added. Dip net and added, trying to avoid pet shop water.
8~Have you added anything new to the tank--decor, new dechlorinator, new substrate, etc.?
nothing new to the tank
9A~What kind of food have you been feeding your fish, have you changed their diet recently?
No diet change, Omega1 food (made in USA)

 

[BrianNY]

Total and sudden fish deaths can be very mysterious. Without doing a battery of tests anyone would be guessing what caused this. My first suspition would be something toxic in the water or food rather than disease. I would test for ammonia and nitrites and get a report from your local water company to see if there are any elevated levels of toxic chemicals.

Let's rule out this first before treating for some unknown disease.