A little less guesswork.
eSHa 2000 calculator
eSHa 2000 — freshwater standard course
Read the product guide and worked examples ↓
Clear amounts. Visible assumptions.
Your calculation, explained
Choose a product and enter the water you’re actually dosing.
- Check the exact product and formulation.
- Use measured water, or make an explicit estimate.
- Review the amount, source and any schedule.
Product guide · edited 28 October 2026
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Which eSHa 2000 plan is calculated?
The standard three-day plan uses 25 drops per 100 L on day one, then 12 per 100 L on days two and three. Soft-water, severe-case and extended plans are outside this calculation.
Worked examples
These illustrations use 100 L of measured water, without a decor deduction. Choose the matching stage or formulation above for your own water volume. They do not select a treatment or establish livestock suitability.
3-Day Course
| Stage | Amount or action for 100 L |
|---|---|
| Day 1 | 25 drops (or 1.25 mL) |
| Day 2 | 12 drops (or 0.6 mL) |
| Day 3 | 12 drops (or 0.6 mL) |
Drops are rounded under this product’s measurement policy; mL uses the unrounded source amount. Choose one measuring method—do not add both. A drop size from another bottle is not interchangeable.
Example only. Your calculation above uses your own inputs. Small amounts and powder fractions still need equipment that can measure them reliably.
Before you measure
Check invertebrate and snail precautions. Retain non-adsorbing filtration while following eSHa’s chemical-media/UV instructions. Do not infer compatibility from the product being a familiar brand.
Product-specific checks from the calculation record
- The standard course does not select soft-water or other adjusted regimens. Read the product leaflet for those conditions.
- eSHa warns about snails, algae and invertebrate exposure. Check the specific guidance before treating a shared tank.
Can I use the standard result for a soft-water adjustment?
No. The tool does not assess the leaflet’s exceptions or automatically choose an adjusted regimen.
Sources and next steps
eSHa manufacturer directions →
Manufacturer page consulted 28 October 2026. Match the exact bottle and leaflet; editorial review does not establish diagnosis or compatibility.