Canister vs Sump vs HOB Filtration: Running Cost, Noise and Maintenance Compared

Every new tank owner in Brisbane eventually asks the same question at the counter: canister, sump or hang on back? The honest answer depends on what you're keeping, how much noise your household will tolerate, and how much time you want to spend on maintenance each month. This guide breaks down the real running costs, decibel levels and upkeep for each system across common Australian tank sizes, from a 60 litre nano to a 400 litre reef.

Table of Contents

• What Each Filtration System Actually Is
• Comparison Table: Canister vs Sump vs HOB
• Running Cost Breakdown
• Noise Levels in a Real Lounge Room
• Maintenance Routines
• Best Filtration for Reef Tanks
• Good, Better, Best Picks
• FAQ

What Each Filtration System Actually Is

A canister filter is a sealed external unit that sits below or beside the tank, pulling water through media baskets via hoses. Brands like Fluval, Eheim and Oase dominate this category in Australia because the seals last years and the media capacity is generous for the footprint.

A sump is a second tank, usually housed in the cabinet below the display, where water overflows down and gets pumped back up. It gives you room for a protein skimmer, refugium, dosing gear and a return pump, all hidden from view. Sumps are standard on most reef builds over 200 litres.

A hang on back filter, or HOB, clips onto the rear glass and uses a small internal pump to draw water up through a cartridge or media tray before it spills back into the tank. They are the cheapest entry point and the easiest to install, which is why so many freshwater starter kits include one.

Comparison Table: Canister vs Sump vs HOB

Running Cost Breakdown

Power draw is where these three systems really separate. A HOB filter pump usually sits around 3 to 8 watts, barely registering on your power bill. A canister filter like the Fluval 207 ($290) or the bigger Fluval FX4 ($540) draws somewhere between 10 and 41 watts depending on tank size, still modest on 240V power over a year.

Sumps cost more to run because you're powering a return pump plus whatever else lives in the cabinet, a skimmer, a wavemaker, maybe a dosing unit. A mid-size return pump alone can pull 25 to 60 watts continuously. Add a skimmer pump and you're looking at meaningfully higher power costs than a canister, though the biological filtration capacity you get in exchange is far greater.

Consumables matter too. Canister owners replace filter pads and carbon regularly, a Aqua One Filter Pad is $17 and Serenity Activated Carbon runs $12 a pack. Sump keepers spend more on media volume, since a sump might house several kilos of Marine Pure Gems ($39 for 90g) or filter socks that need swapping weekly. HOB filters usually just need a cartridge every few weeks, cheap but frequent.

Noise Levels in a Real Lounge Room

If your tank is in a living space where people actually sit and talk, noise is not a minor detail. Canister filters are the quietest option once primed correctly, mostly because the pump housing is sealed and sits away from the tank. A well set up Fluval or Eheim canister is close to silent from a metre away.

Sumps can be dead quiet or annoyingly gurgly depending entirely on how the overflow is tuned. A properly adjusted internal or external overflow with the water level set correctly will run near silent. Get the overflow height wrong and you'll hear trickling water every time you walk past. This is a common complaint we hear from first time sump owners, and it's almost always fixable with a small adjustment to the standpipe or gate valve.

HOB filters are the noisiest of the three by design. Water falls from the outlet back into the tank, creating a constant trickle or splash. Some people find it soothing, others find it grating after a few weeks. If your tank sits near a bedroom, this is worth testing before you commit.

Maintenance Routines

Canister Filters

Expect to open the canister and rinse media roughly once a month, more often if the tank is heavily stocked. Disconnecting hoses is a bit of a wrestle the first few times but gets faster with practice. A Chihiros Clean Hose ($11) makes priming and draining less of a mess on your floor.

Sump Systems

Sumps need weekly attention, mostly topping up evaporated water and checking filter socks or media pads for clogging. Once a month you'll want to give the whole sump a deeper clean, including the skimmer cup and any media reactors. It's more hands-on than a canister but you gain far more flexibility for reef-specific gear.

HOB Filters

Cartridge swaps every two to three weeks keep a HOB running well. Because the media volume is small, neglecting it even by a week can cause a noticeable dip in water clarity. Cheap and fast to service, but it demands more regular attention relative to its size.

Best Filtration for Reef Tanks

For anything beyond a small nano reef, a sump is almost always the better long term choice. It gives you a dedicated space for a skimmer, a refugium for extra biological filtration, and room to dose without cluttering the display. Canister filters can work for smaller reef tanks or as supplemental mechanical filtration alongside live rock, but they lack the flexibility of a sump for growing coral systems.

Whichever route you take, having a leak alarm nearby is cheap insurance. The Aqua One Water Leak Alarm ($28) sits under the stand and alerts you before an overflow becomes a flooded cabinet.

Good, Better, Best Picks

Good: Budget Freshwater Setup

A HOB filter paired with an Aqua One Filter Pad ($17) covers a 60 to 100L freshwater tank cheaply. Add a TLF Metasorb UHC ($50) if you're battling phosphate or nitrate spikes.

Better: Mid-Size Canister Build

The Fluval 207 ($290) suits tanks up to around 220L, quiet, decent media capacity, and easy to service with a Chihiros Clean Hose on hand. Pair it with a Hydor 200 Watt Inline Heater ($96) for a tidy, low-clutter setup.

Best: Reef-Ready Sump Configuration

For a 300L plus reef, a sump loaded with Marine Pure Gems ($39) for biological filtration, a return pump, and a leak alarm underneath gives you room to grow. Browse our marine pure media range and plumbing fittings to plan the build properly. For raw filtration grunt on larger freshwater systems, the Fluval canister range including the FX4 ($540) is worth a look too.

FAQ

Is a canister filter enough for a reef tank?

For a small reef under 100L, yes, especially combined with good live rock and regular water changes. Beyond that, most keepers move to a sump for the extra capacity and equipment space.

Are sumps noisy?

Not if tuned correctly. Overflow gurgle is almost always an easy fix, usually adjusting the water level in the overflow box or standpipe.

How often should I clean a HOB filter cartridge?

Every two to three weeks for most freshwater tanks, sooner if your tank is heavily stocked or you're running high bioload.

Which option has the lowest running cost?

HOB filters use the least power, but canister filters are close behind and offer far more filtration for the wattage. Sumps cost more to run due to return pumps and additional equipment, but the biological filtration payoff is significant.

Can I use a canister filter and a sump together?

Some keepers do, running a canister for extra mechanical filtration alongside a sump for biological and equipment needs. It's not necessary for most tanks but can help with particularly messy stock.

Prices mentioned in this article are accurate at the time of publishing and are subject to change. Please check the relevant product page for the current price before purchasing.