High NH3 (Ammonia toxicity)
High NH3 (Ammonia toxicity) — Caused by excess feed, feces, decaying algae; high pH converts NH4+ to toxic NH3; insufficient microbes.
Symptoms
NH3 > 0.1 ppm: stress, reduced feeding, lethargic. NH3 > 0.5 ppm: black gills, surfacing, edge gathering, scattered mortality.
Risk Level
NH3 > 1 ppm is dangerous — mass mortality possible within 6-12h, especially when pH peaks in afternoon.
Treatment Protocol
1. Maximum aeration.
2. Emergency NH3 absorption: YUCCA C 1L/1,000m³, broadcast immediately.
3. Slightly reduce pH if > 8.5 (no strong acids).
4. Seed treatment probiotics: MAX 4000 1 pack/1,500m³ + NITROBAC 1 pack/1,500m³.
5. Reduce feeding 50% for 2-3 days.
6. Siphon bottom if heavily polluted.
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FAQ
What is High NH3 (Ammonia toxicity)?
Caused by excess feed, feces, decaying algae; high pH converts NH4+ to toxic NH3; insufficient microbes.
Symptoms of High NH3 (Ammonia toxicity)?
NH3 > 0.1 ppm: stress, reduced feeding, lethargic. NH3 > 0.5 ppm: black gills, surfacing, edge gathering, scattered mortality.
Is High NH3 (Ammonia toxicity) dangerous?
NH3 > 1 ppm is dangerous — mass mortality possible within 6-12h, especially when pH peaks in afternoon.
How to treat High NH3 (Ammonia toxicity)?
1. Maximum aeration. 2. Emergency NH3 absorption: YUCCA C 1L/1,000m³, broadcast immediately. 3. Slightly reduce pH if > 8.5 (no strong acids). 4. Seed treatment probiotics: MAX 4000 1 pack/1,500m³ + NITROBAC 1 pack/1,500m³. 5. Reduce feeding 50% for 2-3 days. 6. Siphon bottom if heavily polluted.