What to do if the fish is sick and won’t eat
During fish farming, it is a common problem for fish to become sick and not eat, which may be caused by water quality, disease or environmental changes. This article will provide you with structured solutions based on hot topics and hot content from the entire network in the past 10 days.
1. Analysis of common causes
| Reason type | Specific performance | Proportion (discussion data of the entire network) |
|---|---|---|
| water quality issues | Ammonia nitrogen exceeds the standard and pH is abnormal | 42% |
| parasitic infection | White spot disease, gill parasites | 28% |
| bacterial diseases | Gill rot, enteritis | 18% |
| environmental stress | Change the water temperature difference and add new fish to the tank | 12% |
2. Solution
1. Water quality emergency treatment
Test water quality parameters immediately and refer to the following standards:
| parameters | safety range | Hazard value |
|---|---|---|
| Ammonia nitrogen | 0mg/L | >0.2 mg/L |
| nitrite | <0.1 mg/L | >0.3 mg/L |
| pH value | 6.5-7.5 (fresh water) | ＜6 or ＞8 |
2. Disease treatment plan
Choose corresponding measures based on symptoms:
| Symptoms | possible disease | Recommended treatment |
|---|---|---|
| white spots on body surface | Small melonworm disease | Warm up to 30℃ + white spot net |
| Swelling of gill filaments | Branchiomycosis | 0.5% salt water bath + yellow powder |
| Anal redness and swelling | Enteritis | 3 days fast + allicin |
3. Food attracting techniques
When the fish still refuses to eat after recovering to health, try:
• Change live bait (redworms/water fleas)
• Add garlic juice to soak the feed
• Lower water level to stimulate feeding reflex
3. Preventive measures
| prevention direction | Specific methods | Execution frequency |
|---|---|---|
| water quality maintenance | Change water 1/3 every week | weekly |
| feed management | Feed in a rationed amount and finish eating in 5 minutes | daily |
| Quarantine system | New fish should be quarantined and observed for 7 days | Every time fish comes in |
4. Hot Q&A (high-frequency questions in the past 10 days)
Q1: Why is the fish not eating but very active?
A: It may be caused by unpalatable feed or environmental changes. It is recommended to try changing the feed brand.
Q2: How long does warming treatment need to last?
A: The water temperature for melonworm disease needs to be maintained at 30°C for at least 7 days, and then slowly cool down after the white spots completely fall off.
Q3: Which drugs will damage the nitrification system?
A: Antibiotics (such as oxytetracycline) and high-concentration salt baths will affect nitrifying bacteria. During use, the filtration must be turned off or the dosage must be reduced.
5. Things to note
1. Maintain high dissolved oxygen in the water during treatment
2. Avoid mixing different drugs
3. Record daily observations (it is recommended to use a form to record treatment progress)
With systematic diagnosis and treatment, most food refusals can improve within 1-2 weeks. If there is no improvement for more than 10 days, it is recommended to consult a professional aquatic veterinarian.
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