Originally Posted by 58jam
I purchased a three litre Bi-orb fish tank about three weeks ago and having let the tank run for three days I added two fantail goldfish (one black moor and a normal orange one). Both seemed fine for a week or so and then the black moor got lethargic and died. I tested the water at my local pet store and the amonia levels were too high. I've since bought a home testing kit for amonia and through two 25% water changes (whereby I'm boiling the water first before allowing it to cool to room temperature and adding Nutrafin Aqua plus and Nutrafin Cycle before adding it to the tank). After a week the amonia level is now down to 0.25.
However, the other fan tail which lived has now developed some white spots on his tail and a small amount on his sides behind his gills. I've tested the nitrite level tonight and its reading 0.7. He's also regularly swimming near the surface and is starting to get lethargic.
Can anyone please offer advice or help?...........
Thank you in anticipation
You might like to read up on the cycling process of a fish aquarium
This process takes weeks to complete and is stressful on fish which causes death and disease breakouts.
StaticFX is right, sounds like the living fish has ick, or it could even be a fungus. Jungle brand fizz tab products work really well and will not effect the cycling process your tank is going through.