Real-time monitoring
Temperature, pH, TDS, and salinity: all measured live, all visible at a glance. No spot-checks, no guesswork.
Aquariums that
run themselves.
The smart aquarium controller that watches temperature, pH, TDS and salinity in real time, detects leaks, and automates eight smart power outlets, so your tank takes care of itself.
4.8/ 5·142+ tanks already protected
Marine + freshwateriOS + AndroidOTA updates
Marine + freshwater
2‑year warranty
Free US shipping
30‑day returns
Is your aquarium really being watched?
For too long, aquariums have asked their owners to be in two places at once: checking probes, swapping timers, hovering over heaters. Tank Commander watches every parameter every second, so you don’t have to.
Intuitively designed for you
Listen to the tank for a smarter aquarium.
Eight smart outlets
Lights, heaters, pumps, chillers, fans, wavemakers, skimmers, ATOs: control each on its own or tie it to a parameter so it responds automatically.
Leak detection
Water on the floor triggers a local siren and an instant push to your phone, long before damage is done.
Auto Top-Off
Salinity-aware top-off replaces evaporated water automatically, and cuts off the moment your target is reached so the tank never overshoots.
Stray voltage protection
A built-in grounding probe drains stray voltage from the tank to keep your fish and your hands safe.
pH monitoring
A lab-grade pH probe streams a live reading every second, so you catch drift and swings the moment they start, not on your next spot-test.
Salinity monitoring
Continuous salinity tracking keeps your tank locked to your target, with instant alerts the moment it drifts out of range.
On-device display
A clear, always-on screen shows your live parameters without reaching for your phone.
iOS + Android app
Beautiful real-time dashboards in the phone in your pocket. Check your tank from the couch or anywhere.
Free OTA updates
New features and improvements arrive automatically. Your Tank Commander gets better the longer you own it.
Marine + freshwater
One device for every tank. Switch profiles to match reef, planted, community, or anything in between.
Parameter Diary
Log your manual test results as you go, then browse your full history and watch the trends so you can see where your tank is heading.
The cost of not knowing
One failed heater can cost more than the controller.
One failed heater can cost more than the controller. These are the bills aquarists pay when small problems become big ones.
- Heater stuck on or off overnight$300–$2,000
Cooked or chilled livestock. Replacement fish and corals, plus the time to restock a tank you've spent years building.
- ATO stuck on → salinity crash$500–$5,000
SPS bleaching and coral mortality from a single overnight drift. The expensive corals always go first.
- Tank seal failure or sump leak$1,500–$10,000
Flooring, drywall, and a downstairs ceiling claim. The tank itself is usually the cheapest thing lost.
- Stray voltage exposure$200–$1,500
Slow livestock loss plus replaced powerheads, heaters, and probes once you trace the source.
- Full tank crash → recovery time6+ months
Bacterial colony, coral growth, and livestock maturity don't return on a schedule you control.
One Tank Commander costs less than the smallest of these. Founders pay less than that.
90-second quiz
Take the quizIs your tank one bad night away from a disaster?
Six questions about your setup, your habits, and the failures you'd rather not think about. At the end, we show you exactly where Tank Commander would change the outcome.
See it run
Tank Commander in 60 seconds
Real-time monitoring, leak detection, eight smart outlets, set up in under 15 minutes.
For every tank you'll ever own
One device for the reef, and the river.
Whether you keep delicate SPS corals in a high-end reef or a heavily planted community tank with shrimp and tetras, Tank Commander watches the parameters that matter most to your livestock, and adapts to either world without buying anything else.
Marine & reef
Built for the reef
- Real-time salinity, temperature, and pH for SPS-stable conditions
- Auto top-off on a smart outlet, with a hard salinity safety stop
- Stray voltage protection: a known stressor in long-running reef tanks
- Heater kill-switch above 80°F to protect coral on hot summer days
Planted & freshwater
Tuned for the planted tank
- Continuous TDS to spot waste build-up and dial in water changes
- Tie CO₂ injection to a pH threshold: no more daytime crashes
- Sunrise/sunset light schedules + chiller and fan automations
- Shrimp-safe alerts on TDS swings during top-offs and water changes
1device
Switch profiles between marine and freshwater in the app: same hardware, same probes, same outlets.
8outlets
Heaters, lights, return pumps, chillers, fans, wavemakers, ATOs, CO₂ solenoids, anything you'd plug into a wall.
0missed alerts
Tank Commander watches every parameter every second, and pings your phone the instant something drifts out of range.
Live demo
One controller, eight smart outlets.
Plug in lights, heaters, pumps, chillers, fans, wavemakers, skimmers, and ATOs. Toggle each outlet from your phone, the on-device display, or tie it to a parameter so it responds automatically when something changes.
- Manual: flip an outlet on or off any time, anywhere.
- Schedule: sunrise / sunset lighting, daily UV runs, feeding pauses.
- Auto: cut power if temp spikes, run a chiller above 80 °F, stop the ATO if salinity drifts.
Tank Commander · Outlets
Online
Reef Light
11:00 – 21:00
Heater
Auto · 78.0 °F
Return Pump
Always on
Chiller
Auto · ≥ 80.0 °F
CO2 Dozer
Auto · ≥ 79.0 °F
Wavemaker
Reef mode
Protein Skimmer
Always on
ATO Top-off
Auto · salinity-locked
8 of 8 channelsTap to override · auto resumes
Real reefers, real tanks
Trusted by hobbyists who can't afford to lose a tank.
4.8 · 142 reviews
“I've been testing Tank Commander on my reef for months and it's earned my trust. It caught a heater failure at 2 AM and had the temperature steady by morning with every fish alive. I'd recommend it to anyone serious about their tank.”
Marcus T.Beta tester · Reef keeper, 8 years · 180 gal mixed reef“As a tester I put the setup through its paces: 12 minutes and I had pH, salinity, and temperature trending on my phone. It's replaced my paper logbook completely, and I trust it enough to recommend to my whole club.”
Priya S.Beta tester · Freshwater + planted · 75 gal planted discus“Testing this on my saltwater setup sold me. Stray voltage used to kill fish. The very first alert pinpointed the outlet with a cracked powerhead and I fixed it in 10 minutes. This is the one piece of gear I now tell everyone to get.”
Diego R.Beta tester · Saltwater hobbyist · 90 gal FOWLR“I've tested a lot of controllers and this is the one I kept. The outlet automation alone replaced three timers and a smart plug, the dashboard is cleaner than my Apex was, and the app is genuinely fast. Easy recommendation.”
Hannah L.Beta tester · Aquarist + breeder · Rack of 12 breeder tanks“Running the beta across my fish room (six tanks, one Tank Commander each), the freshwater pH alerts already saved a CO₂ overdose on my high-tech planted tank. It's proven itself, and I trust it on every tank now.”
Tomás A.Beta tester · Planted tank enthusiast · Six planted tanks“I travel for work, so I tested it hard on peace of mind. Knowing my reef is fine, or knowing the second it isn't, is exactly what it delivers. It's the first controller I've trusted enough to leave a tank alone for a week.”
Jess W.Beta tester · Traveling reefer · 60 gal nano reef
The technology
Built like equipment, not like a gadget.
Monitoring
- Parameters
- Temperature, pH, TDS, Salinity
- Updates
- Real-time, continuous
- Tank types
- Marine + freshwater
- Safety
- Leak detection · stray voltage protection
Power outlets
- Outlets
- 8 × independently controlled
- Modes
- Manual, Schedule, or tied to a parameter
- Examples
- Heaters, lights, return pumps, chillers
- Surge protection
- Built-in
App + display
- Local display
- Live parameters at a glance
- Mobile app
- iOS + Android
- Notifications
- Push alerts for anything out of range
- Dashboards
- Real-time charts and history
Connectivity + updates
- Wireless
- Wi-Fi
- Wired
- Ethernet
- Cloud
- Optional, end-to-end encrypted
- Updates
- Free, over-the-air
20+
Active tanks
250+
Alerts resolved
200,000+
Parameters tracked / day
Frequently asked
Answers, in plain language.
A quick set of the most common questions. Looking for something specific? The full FAQ has 259+ answers covering temperature, pH, salinity, leaks, automation, and more.
Which aquariums does Tank Commander work for?
Both marine and freshwater: reef, planted, community, shrimp, cichlid, and more. Switch profiles in the app to match your setup; the same hardware works for every tank type.
How does leak detection work?
A small sensor lives where you place it (under the stand, near the sump). The instant it senses water, the controller sounds a local alarm and pushes a notification to your phone, even if Wi-Fi is down.
What does stray voltage protection do?
A built-in grounding circuit drains stray electrical current from your tank to keep your fish and your hands safe. Tank Commander also monitors that current and alerts you if it climbs.
Can I control the outlets automatically?
Yes. Each of the eight outlets can be switched manually, set on a schedule, or tied to a parameter, for example, cut the heater if temperature spikes, or run a top-off pump when salinity drifts.
Is there a phone app?
Yes, free apps for iOS and Android show all your parameters in real time, send alerts, and let you control outlets from anywhere. The on-device display shows live readings at a glance.
Do I need the cloud?
No. Tank Commander runs everything on your home network by default. The cloud is optional and adds remote access from outside your home plus longer history.
Will it keep getting better over time?
Yes, Tank Commander receives free over-the-air updates. New features and improvements arrive automatically as long as you own the device.
What is the warranty?
2-year limited hardware warranty and free firmware updates. Email support, plus an active community.