TankLog: Aquascape
Fish Tank Log & Reminders
About
This app helps you meticulously track your aquarium's water chemistry, maintenance, and livestock. It offers detailed logging for water parameters, customizable schedules, and equipment inventory, all while prioritizing user privacy with no data collection.
What's New in TankLog
1.41
August 23, 2026
v1.41 — FEELS RIGHT AQUASCAPE PHOTO ZOOM Tap your tank photo and it opens full screen — a clean overlay with your photo filling the display. Tap anywhere to dismiss. Now when you want to really see what's going on in your aquascape, you can. CO₂ GAUGE IS TAPPABLE The needle dot on the CO₂ gauge wasn't doing anything when you tapped it. Now it does — opens the CO₂ parameter page, same as the arrow beside it. If it looks tappable, it should be. ACTIVITY CALENDAR The day panel now uses the actual nav icons next to each logged event — water test, water change, cleaning, dosing, feeding — instead of plain colored dots. The "Today" button also got a calendar icon. Small touches, cleaner read. Free. No login. No subscription.
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FAQ
What is TankLog's privacy policy?
TankLog is designed with privacy as a core feature. It requires no login, no account, and no subscription. All data is stored locally on your device, with no servers collecting or accessing your information. This means no analytics tracking and no third-party access to your aquarium records.
Can I track custom water parameters in TankLog?
Yes, you can customize which parameters appear when you log a water test. You can toggle optional parameters like Phosphate (PO₄) or TDS on or off, and even disable KH and GH if you don't test them. Ammonia and Nitrite are always tracked.
How does TankLog help with CO₂ management?
TankLog estimates dissolved CO₂ levels based on your pH and KH readings. It displays this estimate in color-coded zones (very low, low, ideal, high, at risk), which is particularly useful for planted tank enthusiasts aiming for optimal CO₂ ranges without stressing fish.
Does TankLog offer reminders for aquarium maintenance?
Yes, you can build a fully customizable maintenance schedule within TankLog. This includes tasks like water changes, filter cleans, fertilizer dosing, and equipment checks. The app will send push notifications when each task is due, and overdue tasks are flagged on the dashboard.
What devices is TankLog compatible with?
TankLog is available for iPhone, iPad, and iPod. It is designed to work across these Apple devices, allowing you to manage your aquarium logs wherever you go.
How often is TankLog updated?
The latest version of TankLog is 1.31, and it was last updated on June 25, 2026. While specific update frequency isn't detailed, this indicates active development and support for the application.
What is the user rating for TankLog?
TankLog has received an excellent rating of 5.0 stars from 3 user ratings. This high score suggests a very positive user experience and satisfaction with the app's features and functionality.
Can I export my aquarium data from TankLog?
Absolutely. TankLog allows you to export your full log at any time in a portable format. This ensures that your aquarium history belongs to you and can be easily transferred or backed up as needed.