Tools
Growth and kok tracker
Measure once a month. In a year you will know more about your fish than any forum thread can tell you.
Log your fish
Measure from the nose to the base of the tail, not the tip. Do it the same way each time, roughly once a month, and add a note whenever you change food, tank or routine. Entries stay in this browser: they are not sent anywhere, and they will not follow you to another device.
Growth and kok tracker
Saved in this browser only. Nothing is uploaded.
No entries yet. Measure the fish, add it above, and come back in a month.
| Date | Length | Kok | Since last | Note | Remove |
|---|
What normal growth looks like
A well-fed young flowerhorn in clean, warm water puts on size quickly for the first year, then slows down. Exact numbers vary by strain, genetics and how hard the fish is pushed, so the useful comparison is your fish against itself last month, not against someone else's fish online.
- Growth stalls. Two or three months with no change usually points at water quality, too little food, or a tank that is too small, in that order.
- The kok arrives late. It typically develops well after the body, and it is not a race. Pushing protein to force a kok is how fish end up with bloat and short lives.
- Notes matter more than numbers. A dip after a move or an illness explains itself later when you can see the log.
For what actually drives head growth, read kok growth: what works and what does not. For feeding schedules by age, see the feeding guide.
Questions
Where is my data stored?
In your own browser, on this device. We never see it. Clearing your browsing data, or opening the page in a private window or on another device, means starting fresh. Download the CSV if you want a permanent copy.
How often should I measure?
Once a month is plenty. Measuring weekly mostly records how hard the fish is pressing against the glass.
How do I measure without stressing the fish?
Hold a ruler or a piece of tape against the outside of the glass while the fish is calm and parallel to it. Do not net the fish for a measurement.
My fish stopped growing. Is that bad?
Not necessarily. Growth slows as fish mature. If it stalls early while the fish is still small, check ammonia and nitrate first, then feeding, then tank size.