Tri-Sulfa Tablets – Aquarium & Pond Medication (100 Tablets)

Broad-Spectrum Antibiotic Treatment for Bacterial Infections

Tri-Sulfa Tablets are desgined to treat external bacterial infections of fish in ponds/aquariums. Common infections that we reccomend it for include:

  • White Spot (Ich)
  • Mouth & body fungus
  • Fin & tail rot

This is an antibiotic medication we commonly reccomend it as a broad spectrum antibiotic for a wide range of diseases.

Key Information

  • Active ingredients: Each tablet contains 153.5mg sulfadiazine, 154.7mg sulfadimidine, and 154.1mg sulfamerazine (monosodium salts).
  • Safe for freshwater & saltwater fish: Provides broad-spectrum bacterial control.
  • Important note: Do not use on fish intended for human consumption.
  • Biofilter caution: Antibiotics can disrupt your beneficial bacteria. Use in a separate hospital tank where possible, or re-seed your filter with beneficial bacteria such as THIS after treatment.
  • For optimal results: Remove any carbon from your filtration system and slow down flow if possible. Monitor for ammonia and nitrate during use.

Directions for Use

  1. Remove activated carbon from your filter before dosing.
  2. Pre-dissolve the required tablets in aquarium/pond water before adding to the tank.
  3. Use 1 tablet per 40 litres of water (or 1 tablet per 20 litres for severe infections).
  4. Repeat every 3 days until improvement is seen.
  5. During treatment, reduce feeding and monitor ammonia & nitrate levels. Lower water flow if possible.

How to Calculate Your Tank or Pond Volume

To correctly dose, you’ll need to calculate your water volume:

  • Rectangular tank/pond: Length (cm) × Width (cm) × Height (cm) ÷ 1000 = Litres
  • Cylindrical tank/pond: Radius (cm) × Radius (cm) × Height (cm) × 3.14 ÷ 1000 = Litres

Pack Size

Each bottle contains 100 tablets.

⚠️ Heads-up: Tri-Sulfa is a powerful antibiotic treatment. Always use carefully, monitor water quality throughout the process, and re-establish your biofilter after treatment.
Need help with sick fish?
Not sure which medication or dosage is right for your pond or aquarium? Contact us and we will be happy to guide you