Help Sick Fish With White Stuff



What is the water volume of the tank? 30x12x19
How long has the tank been running? 3+ years
Does it have a filter? Yes
Does it have a heater? Yes
What is the water temperature? 78

How often do you change the water? No-weekly
How much of the water do you change? 10%
What do you use to treat your water?
Do you vacuum the substrate or just the water? Both

*Parameters - Very Important
Ammonia levels were up so did a water change. Ammonia to 0. I will get exact numbers.

Nitrite: 0
Nitrate: 0
pH: 6.0-6.5
Gh: 180
KH: 40

How often do you feed your fish? 2x daily
How much do you feed your fish? Pinch
What brand of food do you feed your fish? Tetra
Do you feed frozen or freeze-dried foods? Dried

Illness & Symptoms
How long have you had this fish? 3+ years
How long ago did you first notice these symptoms? 4 days ago
In a few words, can you explain the symptoms? White stuff dead fish
Have you started any treatment for the illness? Yes
Was your fish physically ill or injured upon purchase? No
How has its behavior and appearance changed, if at all? hiding

Explain your emergency situation in detail. White stuff is taking over. Killed off my Corey Cat Fish


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Last edited by a moderator:
I’m just wondering how it’s possible to have no nitrates at all in an established tank ? Are you using strips or a test kit ?

Also, you say you don’t do weekly water changes, and only 10 %? That is not enough for sure. I would do at least 25%-30% weekly, 40%-50% even better. If you’ve been not doing many changes for a lot of time, there might be problems with your water parameters, even though they don’t show on the usual tests we do.

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