Hardware · Latest
What an Aquarium Costs Per Year to Run: About $45 of Refills
Every cost guide prices the tank and filter, then stops. Here's the recurring half — a year of refills, with reorder intervals and the ones to skip.
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Hey, I'm Julian — a systems engineer from Winnipeg who travels for work and family. I build aquariums designed to run smoothly on auto-pilot for weeks at a time so you never come home to a disaster. More about Julian →
More from the tank
Hardware
Canister Filter Leaking or Grinding? It's One of 3 Parts
A worn impeller, a dried-out lid gasket, or an ungreased O-ring. Which one it is, what each sounds like first, and the five-minute check before a trip.
Hardware
Aquarium Too Hot? Your Fish Suffocate Before They Cook
Warm water holds less oxygen right when fish need more of it. Here's a cooling setup that runs without you — the fan, the lid call, and the high-temp alarm almost nobody sets.
Livestock
How Long Can Fish Actually Go Without Food? The Honest Answer, Before You Buy a Feeder
Every piece of vacation gear on this site assumes your fish need feeding while you're gone. For a healthy adult community tank, a long weekend and often a full week says otherwise — and the device you buy to 'solve' it can do more damage than the fast. Here's how to decide for your tank, and the specific cases where the answer really is no.
Hardware
The Filter Media Stack That Goes Months Between Rinses — and the Layer I Leave Out
A filter that quits while you're away almost never breaks. The flow tapers because the media clogged, and it's always the finest layer that goes first. Here's how to stack media for service interval instead of sparkle, what the surface-area numbers on bio media actually mean, and how to tell your media is due before the flow dies.
Hardware
Aquarium Leak Detectors: Where to Put Them, and Which Kind Still Works When Your Wi-Fi Doesn't
Every monitor on your tank watches the water inside the glass. The expensive failure is the water that gets out. Here's how much can actually escape, where the two sensors go, and the difference between an alarm that texts you and one that just screams at an empty house.
Livestock
How to Get Rid of Pond Snails Without Chemicals
They're not an infestation, they're a measure of how much food nothing eats. Why a predator or copper costs more than the snails, and the feeding fix.
Systems
A Bigger Tank Is Less Work: What Size Aquarium a Beginner Should Actually Buy
Everyone tells beginners to start small because it's cheaper and easier. It's cheaper. It isn't easier. Here's the math on what volume actually buys you — four times the chemistry margin, but only about one and a half times the temperature margin — and the three places bigger genuinely is more work.
Water Management
Does Bottled Aquarium Bacteria Actually Work? The Honest Answer, and the Four Times to Buy It
Some bottled bacteria contains the organisms that actually run your tank's nitrogen cycle. Most doesn't. Here's how to tell the difference without a lab, why a real bottle still fails in the wrong tank, and the four situations where it earns its price.
Water Management
Hose, Pump, or Buckets: The Easiest Way to Do an Aquarium Water Change
The pre-trip water change is the one job every vacation plan depends on, and it's the one people skip — because buckets are miserable. A hose kit, a powered pump, and buckets compared, plus the temperature and dechlorinator details most guides leave out.
Hardware
Automatic Fish Feeder: Drum or Wheel, and Which Clumps
An auto-feeder fails two ways: it skips meals or dumps everything at once. Humidity causes both. Drum vs wheel, and the setup that does neither.
Planted tanks
Red Aquarium Plants Without CO2 That Actually Stay Red
Some species are red by genetics; some only redden under punishing light. In a low-tech tank only the first group works — ranked, plus what goes green.
Hardware
The Under-$100 Tank Automation Stack — and the Two Things You Must Never Put on a Timer
You can automate a freshwater tank for less than a hundred dollars with off-the-shelf smart plugs. The money isn't the hard part. Knowing which three things belong on a switch — and which two must stay plugged straight into the wall — is what separates a tank that survives your trip from one that doesn't.
Hardware
Power Outage Fail-Safes: Your Fish Suffocate Long Before They Get Cold
In a blackout the temperature clock runs for a day. The oxygen clock runs for about two hours. Here's the real failure order, the restart mistake that kills fish after the power returns, and the backup layers ranked by what they actually buy you.
Hardware
Aquarium Heater Controller: What Stops a Cooked Tank
A stuck heater can cook a tank in a day. Here's the external controller that cuts power anyway, plus how to size wattage for your coldest week.
Water Management
Can a Fish Tank Go a Month Without a Water Change?
Yes, some can — here's how to work out whether yours is one of them. The five things that set your real interval, and what breaks when you pass it.
Water Management
Auto Top-Off for a Freshwater Tank: The Build That Works
Not a reef-only thing. A sensor and a reservoir hold your water line for weeks. Sensor types, the right top-off water, siphon safety, reservoir size.
Hardware
Your Heater Will Fail Eventually — A WiFi Monitor Tells You Before Your Fish Do
A stuck heater can cook a tank in a day, and a dead one lets it drift cold for a week. A temperature alarm on your phone is the cheapest insurance in the hobby. Here's what to buy and how to set the thresholds.
Systems
The Biological Buffer: Why an Understocked, Over-Filtered Tank Forgives Your Absence
The real reason some tanks cruise through a two-week trip and others crash isn't the gear — it's the margin built into them. Here's the design principle behind a vacation-proof tank, before you buy a single gadget.
Livestock
Are Odessa Barbs Fin-Nippers? It Comes Down to One Number
Stock them wrong and they shred fins; stock them right and they don't. It's almost entirely school size — here's the number, and who not to pair them with.
Hardware
Fluval FX2 on a 55-75 Gallon Tank: Oversized on Purpose
Deliberately too big for the tank, and that's the point — the media volume rides out two weeks alone. Honest sizing, media stack, Smart Pump notes.
Livestock
Do Mystery Snails Escape? Yes — Here's Where Yours Went
They do climb out. But a snail that's just vanished is almost always still in the tank — here's where to look first, and how to seal the gaps it used.
Vacation-proofing
Leaving Your Fish Tank for 2 Weeks? Rehearse It First
The trick isn't a gadget. Run a 7-day dress rehearsal while you're still home, so every fail-safe fails in front of you instead of on your trip.
Water
Can You Use Softened Water in a Fish Tank? Blend It
Softened water is rough on fish and an RO unit is overkill. Blend your softened and unsoftened taps until the numbers land — the ratio and the test.
Automation
Beat Vacation Algae by Automating Your Lights
Come home to green water and black fuzz? The cause is almost always too many hours of light with nobody managing it. A timer and a shorter, split schedule fixes it while you're gone.
Planted tanks
Alternanthera Reineckii Without CO2: A Low-Tech Grow Guide
AR is the red plant people try without gas, and most turn the wrong dial. Substrate first, ferts next, light last — plus the trim that keeps it bushy.
Field notes
Why I Built a Tank That Runs Itself
I wanted a living backdrop for my video calls. Then I did the math on how much I travel — and realized the only aquarium that would work for me was one that could run itself for two weeks straight.