Aquarium Magnet Cleaners Ranked by Glass Thickness
The Mag-Float 360 Floating Magnet Cleaner leads because it floats when separated, which spares your hand a trip into the water. The Flipper Standard 2 in 1 is the value pick for its flip out blade. For nano tanks, the Tunze Care Magnet Nano 0220.020 is the one that fits.
If you want one magnet cleaner that suits a typical glass aquarium, the Mag-Float 360 Floating Magnet Cleaner is the safest choice, with the Flipper Standard 2 in 1 close behind for stubborn coralline. Nano keepers should skip both and look at the Tunze Care Magnet Nano instead.
Buying a magnet cleaner is mostly a matching exercise, and that is where it goes wrong. A magnet rated for quarter inch glass on a half inch tank feels weak and slips constantly, while an oversized magnet on thin glass is hard to move and risks trapping grit against the pane. We compared stated glass thickness ratings, whether the inner half floats or sinks when separated, pad and blade materials, and what owners report about scratching, rust and magnet strength after a year in service.
How to choose
Measure your glass before anything else Every magnet cleaner carries a maximum glass thickness rating, and it is the single specification that decides whether the tool works. Measure the top rim of your tank rather than guessing from the volume, because two aquariums of the same capacity can use different pane thicknesses. A magnet used beyond its rating slips constantly and feels weak. One used well below its rating drags hard and makes trapped grit more dangerous.
Floating models exist for a reason When the two halves separate, a non floating inner block drops straight into the substrate. Retrieving it means rolling up a sleeve, disturbing the sand bed and often stirring a cloud through the water column. Floating designs surface instead. It sounds like a small convenience until it happens during a Sunday clean on a deep tank.
Acrylic tanks need different surfaces Steel blades and firm scrubbing faces that are fine on glass will scratch acrylic permanently. If your tank is acrylic, choose a cleaner sold with an acrylic safe pad or a plastic blade option, and check the packaging rather than assuming. Even on glass, a single grain of sand caught under the pad can leave a visible arc, so lift the magnet clear of the substrate line before you start each pass.
Match the tool to the algae you actually have Soft green film wipes away with a felt or foam pad. Coralline algae in reef tanks is calcified and needs a blade to shift. Diatom films respond to almost anything. Buying a bladed cleaner for a freshwater community tank adds risk without benefit, while buying a plain pad for a mature reef means polishing hard deposits forever. Decide which problem you are solving first.
The best picks, ranked
Mag-Float 360 Floating Magnet Cleaner
The defining feature is simple and genuinely useful: if the halves separate, the inner block floats to the surface instead of sinking into the substrate. The felt pad clears film algae without much pressure and the plastic body has no metal to corrode. It suits mid size glass tanks better than anything else here.
Pros
- Floating inner half saves wet sleeves
- No exposed metal to rust in saltwater
- Wide size range across the product line
Cons
- Felt pad picks up sand and can drag it
- Struggles with hardened coralline algae
Flipper Standard 2 in 1 Magnetic Aquarium Cleaner
Roll the outer magnet and the inner half flips from a soft pad to a stainless blade without your hand entering the water. That makes short work of coralline patches that felt pads simply polish. Reef keepers report it is the tool they reach for most between water changes.
Pros
- Switches to a blade without getting wet
- Blades are cheap and replaceable
- Handles coralline that pads leave behind
Cons
- Inner half sinks if the halves separate
- Steel blade must not touch acrylic panes
Aqueon Algae Cleaning Magnet
A straightforward two piece magnet with a scrubbing pad, sold in sizes matched to common tank ranges. There is no blade and no float, but for weekly film algae on a freshwater community tank that is often all you need. Owners report it holds well within its stated glass rating.
Pros
- Widely stocked and easy to size
- Non abrasive pad is acrylic friendly
- Comfortable outer grip
Cons
- No blade for hard deposits
- Sinks to the substrate if it detaches
Tunze Care Magnet Nano 0220.020
A compact magnet sized for nano and pico tanks where a full size block is unwieldy and too strong for thin glass. The cleaning surface is designed to release trapped grains rather than grind them along the pane. It is the sensible option for tanks under about twenty gallons.
Pros
- Right size and strength for small tanks
- Pad design helps release trapped sand
- Reaches into tight corners
Cons
- Too weak for standard thickness glass
- Small face means slower coverage
Fluval 2 in 1 Algae Magnet Cleaner
A dual surface magnet with a soft pad on one part and a firmer scrubbing face for tougher spots, aimed at people who do not want to own two tools. The curved shape sits comfortably in the hand during long cleaning sessions. It is a reasonable middle ground between plain pads and bladed cleaners.
Pros
- Two cleaning surfaces in one tool
- Comfortable shape for long sessions
- Good hold across mid thickness glass
Cons
- Firm face is risky on acrylic
- Bulkier than nano options in corners
Jasonwell Aquarium Glass Cleaner Magnet Brush
A floating design with an included handle attachment that helps you reach the lower panes on deeper tanks without leaning in. The scrubbing face is soft enough for routine film algae and includes a small scraper blade for spot work. Based on specifications it targets mid range glass thicknesses.
Pros
- Floats free if the halves separate
- Handle helps reach deep tank bottoms
- Includes a scraper for spot cleaning
Cons
- Magnet weakens near its rated maximum
- Handle attachment feels less rigid than the magnet
Kedsum Aquarium Magnetic Cleaner Brush
A basic floating magnet brush intended for weekly maintenance rather than heavy restoration work. It clears fresh film algae quickly and does not demand much grip strength to move across the pane. Owners report it is best kept for thinner glass and routine upkeep.
Pros
- Light and easy to move one handed
- Floats rather than dropping into gravel
- Gentle enough for regular use
Cons
- Not strong enough for thick glass
- Little use against hardened deposits
Side by side
| # | Model | Glass rating | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | Mag-Float 360 Floating Magnet Cleaner | Up to around 3/4 inch | Best overall | 9.4 | Check price |
| 2 | Flipper Standard 2 in 1 Magnetic Aquarium Cleaner | Up to around 1/2 inch | Best value | 9.2 | Check price |
| 3 | Aqueon Algae Cleaning Magnet | Varies by size, up to 3/8 inch | Best budget | 9.0 | Check price |
| 4 | Tunze Care Magnet Nano 0220.020 | Thin glass up to around 1/4 inch | Best for nano tanks | 8.8 | Check price |
| 5 | Fluval 2 in 1 Algae Magnet Cleaner | Up to around 1/2 inch | Best for mixed algae types | 8.6 | Check price |
| 6 | Jasonwell Aquarium Glass Cleaner Magnet Brush | Up to around 1/2 inch | Best for tall tanks | 8.3 | Check price |
| 7 | Kedsum Aquarium Magnetic Cleaner Brush | Up to around 3/8 inch | Best for routine light cleaning | 8.0 | Check price |
Common questions
How do I know which magnet size to buy?
Match the stated glass thickness rating to your tank walls, then size up only if the pane is at the top of the range. Manufacturers publish rating bands for each size in a product line, so the same brand may offer three or four options that differ mainly in magnet strength.
Will a magnet cleaner scratch my tank?
The magnet itself does not, but grit trapped under the pad does. Keep the cleaner above the substrate line, rinse the pad after every session and inspect it for embedded sand. On acrylic, use only pads and blades labelled acrylic safe.
Can I leave the cleaner inside the tank between uses?
Many keepers do, parked in a corner. It saves handling and keeps the pad wet. The trade off is that a permanently submerged pad can become a surface for algae itself, and any exposed metal will corrode faster in saltwater, so favour fully sealed plastic bodies for this.
Do these work in saltwater and reef tanks?
Yes, provided the body is fully sealed with no exposed steel. Reef tanks build coralline algae that plain pads will not remove, so a flip out blade or a separate scraper is worth having alongside the magnet.
Why does my magnet keep falling off?
Almost always a thickness mismatch, or algae buildup on the pad reducing contact. Confirm the rating against your glass, clean the pad, and move the magnet slowly rather than sliding it fast across the pane. Sudden direction changes break the hold more than steady pressure does.
Are magnet cleaners better than scraper blades on a handle?
They are better for routine weekly cleaning because you never put your hands in the water, which keeps oils and soap residue out of the tank. Long handled scrapers still win for one off restoration of a badly neglected pane, where you want direct force and full visibility.
How often should I clean the glass?
Weekly is typical for most stocked tanks, and it is easier than letting film build for a month. Frequent light passes need less pressure, which in turn reduces scratch risk. If algae returns within a day or two, the underlying cause is usually lighting duration or nutrient levels rather than the cleaning tool.
Do magnet cleaners lose strength over time?
The magnets themselves hold their strength for years under normal aquarium temperatures. What actually degrades is the pad, the blade edge and any seal around the housing. Replace pads when they glaze over, and retire any cleaner showing water ingress or rust staining.
The bottom line
For most glass aquariums the Mag-Float 360 Floating Magnet Cleaner is the pick, mainly because a floating inner half turns a routine annoyance into a non event. Reef keepers fighting coralline should choose the Flipper Standard 2 in 1 for its flip out blade, and nano tanks are better served by the smaller, gentler Tunze Care Magnet Nano.
