Tidal — Reef Tank Tracker

Tidal Reef is the simplest way to keep your reef aquarium thriving. Log water chemistry readings, track water changes, and spot trends before they become problems — all stored privately on your device.

PARAMETER TRACKING
• Log salinity, pH, alkalinity, calcium, magnesium, temperature, nitrate, phosphate, and any custom parameter you add
• Color-coded in-range / out-of-range indicators at a glance
• Compare your latest reading against your previous one to see the direction things are heading

CHARTS & HISTORY
• Smooth line charts with your target range shaded in — instantly see when a parameter drifted
• Water change markers overlaid on parameter charts so you can spot cause and effect
• Searchable, filterable history list grouped by month
• Calendar view to see which days you tested

WATER CHANGES
• Log water change volume (%) and optional notes like salt brand or dosing additions
• Dot chart showing your water change frequency over time
• Summary card on the dashboard shows your last change and recent count

DESIGNED FOR REEFERS
• Works completely offline — your data never leaves your device
• Light, dark, and system-adaptive themes
• Celsius or Fahrenheit temperature display
• Optional testing reminder notification so you never miss a scheduled test day
• Full backup and restore via a portable JSON file

Whether you're keeping a simple FOWLR or a demanding SPS reef, Tidal Reef gives you the clarity to act before small shifts become big problems.