Reef Tank Log: Parameters

NEVER LOSE YOUR REEF DATA AGAIN. Reef Tank Log is the offline-first journal built for saltwater reef keepers. Log your parameters, schedule your dosing, and track your corals — all on your device. No account. No ads. No subscription just to write down a test result. Tired of apps that crash and wipe months of data, or suddenly lock basic logging behind a paywall? This one doesn't. Logging your parameters and backing up your data are free, forever. — TRACK EVERY PARAMETER — Salinity, alkalinity, calcium, magnesium, nitrate, phosphate, pH and temperature, logged with the exact precision reefers need (yes, salinity to 1.0255). Tag each result with the kit you used — Hanna, Salifert, Red Sea or API. — FIX A BAD READING — Fat-fingered 85 instead of 8.5? Open the reading history from the chart and edit or delete any single point. Your trend line is never stuck with a typo. — SEE THE TREND, NOT JUST THE NUMBER — Clean trend charts with your target range shaded in, so you instantly see when alkalinity is drifting. View 30 days, 90 days, a year, or all of it, with a stability readout for the window. — DOSING DONE RIGHT (Pro) — Schedule alk, calcium, magnesium and trace doses daily, every N days, or on a chosen weekday, with local reminders that fire offline. Tick a dose off in one tap. — A REEF-FOCUSED LIVESTOCK JOURNAL — Add corals, fish and inverts by common and scientific name, sorted into SPS, LPS, softies, fish and inverts. Keep a tagged written journal per animal to follow growth, colour and health, and mark anything fragged, sold or lost. — MAINTENANCE & EQUIPMENT — Log water changes with percentage and cost, skimmer services, glass cleans and media swaps. Keep a list of your lights, pumps, heaters and dosers with install dates and warranty notes. — YOUR DATA STAYS YOURS — Everything is stored locally on your device. Export a full backup to Files, iCloud or Drive anytime, and restore it in one tap. No login that can lock you out. No tracking. No ads. FREE forever: • 1 tank • Unlimited parameter readings • Trend charts and stability • Livestock journal, maintenance and equipment • Full backup & restore Reef Tank Log Pro ($3.99/mo · $19.99/yr · $29.99 one-time): • Unlimited tanks • Dose schedules with offline reminders Logging and backup are always free. Pro is a one-time option too — because we know reefers are done with subscriptions. Built for the hobbyist who treats their reef like the living investment it is. Terms of Use: https://codeensis.com/reeftanklog/terms Privacy Policy: https://codeensis.com/reeftanklog/privacy Monthly and Yearly are auto-renewing subscriptions charged to your Apple ID at confirmation of purchase. They renew automatically unless cancelled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the period ends. Manage or cancel in Settings → Apple Account → Subscriptions. Lifetime is a one-time purchase and does not renew.