Purpose-Built
A local reef-chemistry bench for alkalinity, calcium, magnesium, salinity, and dosing-plan calculations with transparent units.
One-time iPhone and iPad app
Reefstoich
Reef chemistry and dosing calculator
Core Tools
- Concentration and dosing calculations
- Before-and-after chemistry comparisons
- Forty bundled reef-chemistry reference plates
Private by Design
No account, ads, tracking, third-party analytics, or developer-operated backend. Your work stays on your device unless you deliberately share or export it.
Use It Responsibly
Test water with reliable methods and make gradual changes. Calculations do not replace product instructions, livestock observation, or experienced aquarium guidance.