Sick minnows... fin rot/body necrosis?

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youaremyjoy

Aquarium Advice Apprentice
Joined
Jul 3, 2014
Messages
16
Hi...
I have been working on a new tank, starting from scratch and was using some $0.15 minnows to help get it cycled. This is week 2. I started with 4 of these rosy red minnows in a 15 gal tank.
1~What type of fish is afflicted? In addition, please describe what is wrong with the fish to the best of your ability (i.e. cotton like growth, bloated, etc.).
Rosy red minnows.
Starts with loss of tail fin, then body flesh starts turning white.
Progresses to loss of pectoral fins.
Fish die within 48-72 hrs of showing signs.

2~What are your tank parameters (ammonia, nitrites, nitrates, temp, pH)? Please give exact values.
Ammonia/nitrites/nitrates all 0, using API master test kit. Temp 76-78F. pH 6.8

3~ How large is the tank? How long has the tank been set up?
15 gal, 2 weeks into cycling.
Using some Eheim ceramic media from established tank at trusted LFS to help.

4~What type of filtration are you using? Please give the name and number (i.e. Fluval 304) and amount of gph if known.
Tetra whisper 20 filter

5~How many fish are in the tank? What kinds of fish are they and what are their current sizes?
4 fish, rosy red minnows, less than an inch in length

6~When is the last time you did a water change and vacuum the gravel? How often do you do this? How much water do you remove at a time?
Changed water 25% daily, added API stress coat and quick start with each change.


7~How long have you had the fish? If the fish is new, how did you acclimate it/them?
2 weeks. Floated in bag in tank for a 60-90 minutes, added little bit of

8~Have you added anything new to the tank--decor, new dechlorinator, new substrate, etc.?
9~What kind of food have you been feeding your fish, have you changed their diet recently?
 
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