Frag: Aquarium & Reef Tracker

Log water parameters in seconds. Spot trends before problems. One-time purchase — no subscription.

Stop guessing if your tank is stable. Frag logs water parameters in seconds, shows trend charts with safe range bands, and reminds you before maintenance slips.

▸ LOG 10 PARAMETERS IN 10 SECONDS Tap a cell, type a number, move on. pH, ammonia, nitrite, nitrate, temp, salinity, alkalinity, calcium, magnesium, phosphate — all logged before your test kit dries.

▸ SPOT TRENDS BEFORE PROBLEMS Every parameter gets a trend chart with safe range bands. See drift at a glance — not just "what's my pH today" but "is my pH dropping?"

▸ NEVER MISS A WATER TEST Smart reminders for water changes, filter cleaning, dosing, and testing schedules. Frag keeps track so you don't have to remember.

▸ TRACK YOUR WHOLE FISH ROOM Multiple tanks, each with its own parameters, maintenance schedule, and livestock. Switch between tanks in one tap.

▸ KNOW BEFORE YOU ADD Compatibility warnings flag species conflicts before you buy. Stocking calculator shows when your tank is approaching capacity.

▸ CORRELATE PARAMETERS Overlay charts let you see two parameters side by side — spot cause and effect between alk, calcium, pH, temp, and more.

▸ SHARE & EXPORT Share trend charts as images. Export parameter history as CSV for your records or your LFS.

WHY FRAG? • One-time purchase — no subscription, no recurring charges, yours forever • Offline-first — works in your fish room with no wifi • Fast — built for speed, not for upsells • Beautiful — designed for dark mode, easy on the eyes at 2am

STANDARD • 1 tank with full parameter logging • Latest values dashboard • Maintenance reminders

PRO • Unlimited tanks • Trend charts with safe range bands • Parameter overlay charts • Compatibility warnings • Stocking calculator • CSV export & chart sharing

Built by an aquarist who was tired of spreadsheets.