Brightwater: Aquarium Care

Brightwater keeps your aquarium on schedule — and answers the questions every fishkeeper googles. Log water tests in seconds, get reminders that name the tank and the job, plan your light hours, and walk a brand-new tank through its nitrogen cycle day by day. No account, no ads, and your data never leaves your phone. FAST LOGGING, WET HANDS WELCOME A big-key quick-log sheet opens from anywhere: every parameter for your tank type (temperature, pH, ammonia, nitrite, nitrate, hardness — plus salinity, alkalinity, calcium and magnesium for reef tanks), prefilled with your last reading, with a plain-language interpretation as you type. Multiple readings a day, editable later, saved instantly. CHARTS WITH A SAFE RANGE YOU CAN SEE Every parameter charts over time with a shaded safe band for your tank type, status-colored readings, and water-change markers. Spot the drift before it becomes a problem. A LIGHT PLAN FOR YOUR TANK Tell Brightwater your tank type and situation and get a recommended photoperiod with the reasoning, a timer card ("ON 10:00 · OFF 18:00") to set your plug timer by, optional on/off reminders, and an honest note on the siesta method. Got algae? A step-by-step troubleshooter identifies what you're seeing and prescribes a numbered plan — and can apply the new light hours to your tank in one tap. CYCLE A NEW TANK WITH CONFIDENCE The guided nitrogen-cycle assistant walks fishless (dose-and-test) or fish-in paths day by day: what to do today, why the nitrite spike is normal, what stalls a cycle, and exactly when it's safe to add fish — driven by your own readings, with honest "typically 2–6 weeks" expectations. REMINDERS THAT KNOW YOUR TANK Preloaded care schedules by tank type — water changes with the exact liters to change, filter rinses in tank water, test cadences — that reschedule from when you actually did the job. Quiet hours respected. Never a duplicate. DOSING, LOGGED THE WAY YOU ACTUALLY DOSE Add whatever you use by name — no product database, no dosage advice. A quick-dose sheet prefills your last amount, undo is one tap, and every dose lands in the tank's history beside your test results. Logging is free, with one dosing schedule per tank; Premium adds extra schedules, dose reminders, and dose markers overlaid on your charts. EQUIPMENT THAT REMEMBERS ITS OWN SERVICE Track filters, heaters, lights and pumps with purchase dates, prices (they flow into your expense log), photos and notes — then log each service and see "last done 14 days ago" at a glance. Per-item service reminders join your maintenance schedule. Inventory and the service log are free. EVERYTHING ELSE THAT BELONGS IN A TANK LOG Inhabitants with history (sold, died, or moved between tanks — records are never deleted), a photo diary, notes, and a per-tank expense log. Export any tank's full history as CSV, free, always — and import one just as freely: Brightwater reads its own exports and AquaticLog files in one tap, walks you through a column mapper for anything else, and skips readings you already have, so re-importing the same file changes nothing. BRIGHTWATER PREMIUM • Unlimited tanks (1 free) • Full chart history and multi-parameter overlays • Light plans for every tank and the full algae troubleshooter • The full cycle assistant beyond week one • Custom care cadences and extra schedules • Extra dosing schedules, dose reminders and chart overlays • Unlimited photos per diary entry Subscriptions renew automatically unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in your App Store settings. Payment is charged to your Apple ID. Brightwater provides general hobbyist guidance with cited sources; it does not guarantee water quality, plant, or livestock outcomes, and it does not connect to or control any hardware. Terms: https://bogtsi.xyz/brightwater/terms Privacy: https://bogtsi.xyz/brightwater/privacy Bright water, healthy fish, no spreadsheet.