Quick eSHa 2000 Dose Calculator
Calculate the 3-day treatment dose based on the common label schedule:
- Day 1: 25 drops per 100 liters
- Day 2: 12 drops per 100 liters
- Day 3: 12 drops per 100 liters
Approximate conversion used: 20 drops = 1 mL. Always follow the product label and manufacturer guidance for your specific bottle/version.
How this eSHa 2000 dosage calculator works
This calculator applies the widely used 3-day eSHa 2000 schedule to your tank volume, then gives you drop counts for each day. It also estimates milliliters so you can compare doses if you use a syringe or measuring pipette.
Accurate dosing matters in fish treatment. Too little may be ineffective, while too much can stress fish, plants, shrimp, and beneficial bacteria. Enter your true water volume (not just nominal tank size) for the best result.
Standard 3-day eSHa 2000 dosing schedule
Label-style baseline
- Day 1: 25 drops per 100 L
- Day 2: 12 drops per 100 L
- Day 3: 12 drops per 100 L
If you keep delicate species, very young fish, or fish under heavy stress, many hobbyists discuss reduced dosing. Only use a half dose when appropriate and always verify with official instructions.
Step-by-step: getting the most accurate dose
1) Estimate real water volume
Subtract displacement from substrate, rocks, and décor. For many aquariums, real volume is 80% to 90% of nominal tank capacity.
2) Choose the correct unit
This calculator supports liters, US gallons, and UK gallons. Internally, everything is converted to liters for dosing math consistency.
3) Dose once per day for 3 days
Follow Day 1, Day 2, and Day 3 amounts exactly. If you perform large water changes during treatment, consult label guidance before re-dosing.
Example calculations
Example A: 60 L community tank (standard dose)
- Day 1: 15 drops
- Day 2: 7.2 drops (practically rounded dosing may be needed)
- Day 3: 7.2 drops
Example B: 20 US gal tank, half dose profile
20 US gal is about 75.7 L. At half dose:
- Day 1: about 9.5 drops
- Day 2: about 4.5 drops
- Day 3: about 4.5 drops
Best practices during treatment
- Observe fish appetite, respiration, and swimming behavior each day.
- Keep temperature stable and avoid sudden parameter swings.
- Use extra aeration when medicating, especially in warm water.
- Do not overdose to “speed up” recovery.
- After treatment, restore filtration media according to label advice.
Frequently asked questions
Can I use this for hospital tanks?
Yes. In fact, hospital tanks often make dosing easier and safer. Just enter the exact hospital tank water volume.
Why does the calculator show decimal drops?
The math is exact, but real-world drops are discrete. For very small tanks, pre-diluting medication in measured water can help improve dose precision.
Is this a substitute for the official label?
No. Treat this as a convenience calculator only. Always prioritize your product’s packaging instructions and local veterinary guidance.
Final note
Use this eSHa 2000 dosage calculator to reduce guesswork and keep your treatment routine consistent. Enter your actual water volume, follow the daily schedule, and monitor fish closely throughout the full 3-day cycle.