ReefBuddy

Stop guessing. Start thriving. Your reef tank deserves better than guesswork. ReefBuddy logs your water chemistry, shows you the trends, and uses AI to turn your test results into clear, specific recommendations, so you can focus on watching your corals grow. AI-POWERED ANALYSIS Enter your water parameters and tap Analyze. In seconds you get a plain-English summary, warnings first, specific recommendations and dosing amounts worked out for your tank's volume and type. No more forum diving or conflicting advice. TRACK EVERYTHING Log temperature, salinity, pH, alkalinity, calcium, magnesium, nitrate, phosphate, ammonia and nitrite. Every field shows its healthy range as you type. Log water changes alongside your tests so you can see what each one did. TREND CHARTS See any parameter charted against its healthy range, from the last week to the last year. Spot the slow drift weeks before your corals show it. LIVESTOCK MANAGEMENT Catalogue your corals, fish and invertebrates with photos, species, purchase details and a health log timeline. Track recovery, not just losses. MAINTENANCE REMINDERS Schedule water changes, filter service and testing, every N days or on set weekdays. Your phone reminds you. MULTIPLE TANKS Display, frag tank, quarantine, nano. Seven tank types, each with its own history, livestock and reminders. YOUR DATA, YOURS Export any date range to CSV and send it to a spreadsheet, an email or your local fish store. BOLD DESIGN A high-contrast, New Brutalist interface built to be read at arm's length with wet hands. No clutter. Just the information you need. FREE TO USE, NO SUBSCRIPTION Logging, charts, livestock and reminders are free. AI analysis includes 3 free analyses per device, then credit packs of 5 or 50. Credits never expire. No account required. Whether you are a seasoned reefer or starting your first nano tank, ReefBuddy gives you the confidence to keep your reef healthy, stable and thriving.