Why Resistance Happens
Underdosing or stopping treatment early lets surviving bacteria pass resistance to next generation.
Long-term low-dose prophylactic dosing is the worst — it selects for resistant strains continuously.
Best Practices
Treat ONLY when needed, not as routine maintenance.
Always complete the full treatment course per label.
Rotate antibiotics — do not use the same drug repeatedly across cases.
- ✦Document treatments with dates — easier to spot patterns
- ✦Keep different antibiotic classes on hand: kanamycin (Kanaplex), Furan-2, erythromycin
- ✦Combine antibiotic treatment with water quality improvement — drugs alone often fail
Single-Class Trap
Hobbyists tend to favor one drug. Bacteria in their tanks evolve resistance to it specifically.
Switching to a new drug class can resolve infections that "stopped responding" to old favorites.
When Drugs Fail
First step: switch drug class. Second: deep-clean tank with bleach, restart.
Test water quality — most "resistant" infections are actually environmental, not antibiotic-resistant.