The Flipper Cleaner Max is a dual-sided magnetic aquarium cleaner that scrubs algae off glass or acrylic using a floating outer piece you control from outside the tank. The "Max" version is the larger, more powerful variant in the Flipper lineup, designed for tanks with thicker glass (up to 15mm) and for cleaning larger surface areas faster than the standard Flipper. If you're deciding whether it's worth the price premium over cheaper magnetic cleaners, the short answer is yes, for tanks over 40 gallons with glass panels 10mm or thicker.
This guide covers exactly what the Flipper Max is, how it differs from the original Flipper and other magnetic cleaners, how to use it without scratching your tank, and what to watch out for.
What Is the Flipper Cleaner Max?
The Flipper Cleaner Max is made by Flipper Aquatics and is the top-tier model in their magnetic cleaner range. The standard Flipper handles glass up to 8mm thick, while the Max handles up to 15mm, which covers most tanks up to around 180 gallons or custom thick-glass builds.
What sets the Flipper line apart from generic magnetic scrapers is the dual-sided design. One side has a felt scrubbing pad for routine algae film removal. The other side has a harder, more aggressive scraper blade for removing stubborn coralline algae, green spot algae, and calcium deposits. You flip between the two modes by rotating the outside piece, without removing anything from the water. That's where the "Flipper" name comes from.
The outer piece (the one you hold outside the tank) is positively buoyant, meaning if you lose grip on it or knock it off, it floats to the surface rather than pulling the inner piece down into your substrate or against a coral. That's a genuine quality-of-life feature you appreciate after the first time a standard magnetic cleaner falls and scratches your glass or crushes something.
The Max version is noticeably larger than the standard Flipper. The cleaning surface is bigger, so you cover ground faster. The magnets are stronger, which is necessary for thick glass but also means it grips tighter to the glass and glides with more resistance. For thin glass (6mm or less), the Max is overkill and actually more awkward to use than the standard version.
Flipper Max vs. Standard Flipper vs. Competitors
Standard Flipper vs. Max
| Feature | Flipper Standard | Flipper Max |
|---|---|---|
| Glass thickness | Up to 8mm | Up to 15mm |
| Cleaning surface | Smaller | Larger |
| Price | Lower | Higher |
| Best for | 10-75 gallon tanks | 75+ gallon tanks |
| Weight | Lighter | Heavier |
If your tank glass is 10mm or under and you have a standard 40 to 75 gallon display tank, the standard Flipper is probably the better fit. The Max's stronger magnets make it harder to maneuver in corners on smaller tanks.
Flipper Max vs. Mag-Float
The Mag-Float is the longtime standard for magnetic cleaners. It's cheaper and widely available. The trade-off is that it only has one cleaning surface (felt or foam, no scraper blade), so you can't switch modes for stubborn algae without removing the inner piece and swapping pads. For light, routine maintenance on established tanks, the Mag-Float is fine. If you're dealing with green spot algae or coralline, the Flipper Max's scraper blade changes the cleaning experience completely.
Flipper Max vs. Two Little Fishies Mag-Scraper
The Two Little Fishies Mag-Scraper is another strong competitor, particularly for reef tanks where you want to scrape coralline without scratching glass. It uses a stainless steel blade. It doesn't have the dual-sided flip feature, but the blade is effective and the build quality is good. Price-wise, it's competitive with the Flipper Max.
How to Use the Flipper Cleaner Max Without Scratching Your Tank
Scratched glass is the main risk with any magnetic algae cleaner. Here's how to avoid it.
Keep the Inside Clean
The inner piece (the one in the water) will trap sand grains and gravel between the magnet housing and your glass if any substrate gets kicked up near it. A single piece of coarse gravel dragged under the magnet will scratch a line across your glass. This is not a Flipper-specific issue; it happens with all magnetic cleaners.
Before each use, rinse the inner piece under fresh water. Check that the felt pad or scraper blade is seated cleanly with no debris stuck to it. If you have a sand substrate, be especially careful not to drop the inner piece and then drag it while sand is stuck to the magnet.
Use the Right Side for the Job
The felt side is for routine cleaning of soft green algae film, the kind that builds up over a week or two on a well-lit tank. The scraper side is for harder deposits: green spot algae (the stubborn circular spots), coralline algae on glass (common in reef tanks), and mineral deposits.
Don't use the scraper side on acrylic. The blade will permanently scratch acrylic panels. Flipper sells acrylic-safe replacement pads for the Flipper line, but the scraper blade itself is only for glass.
Go Slow on Stubborn Algae
When you're using the scraper side on green spot algae, slow deliberate strokes work better than fast scrubbing. The blade needs to get under the algae to lift it. Fast strokes just skate over the top. Position the scraper edge against the spot, apply moderate pressure by pulling the outer piece firmly against the glass, and draw it straight across.
Work Top to Bottom
Start at the waterline and work downward. Algae you scrape off falls downward. If you start at the bottom, the algae you dislodge above will settle on areas you already cleaned.
Replacement Pads and Long-Term Maintenance
Flipper sells replacement felt pads for the Max separately. The felt pads wear out over time, and a worn pad is less effective and slightly more likely to trap particles. Replace the felt pad when you notice the surface getting thin or matted.
The scraper blade can also dull over extended use, especially if you're regularly removing coralline or mineral deposits. Replacement blades are available from Flipper directly and from aquarium supply retailers.
The outer piece is waterproof but shouldn't be submerged regularly. The magnetic core is sealed, but prolonged submerging of the handle section can degrade the grip material over time. Rinse it after use, let it dry, and store it out of the water.
If you're building out a well-equipped tank setup, the Flipper Max pairs well with the rest of your equipment. See our roundup of best aquarium equipment for recommendations on filters, heaters, and lighting that complement a clean glass maintenance routine.
What Kind of Algae Does the Flipper Max Handle Best?
Green Film Algae
This is the soft, hazy green coating that builds up on glass over a week or two. Almost every tank gets it. The felt side of the Flipper Max removes this easily in a single pass. It's not much of a challenge for any decent magnetic cleaner.
Green Spot Algae
Small, hard circular green spots that resist regular wiping. This is where the scraper blade earns its place. Green spot algae typically indicates high phosphate levels or too much light intensity, so vacuuming and reducing feeding alongside the mechanical removal helps prevent it from coming back fast. The scraper blade pops these spots off clean.
Coralline Algae (Reef Tanks)
Coralline is calcified and hard. It's a sign of a healthy reef, but when it grows on the glass it blocks your view. The scraper blade handles coralline well on glass. You may need to make multiple passes on thick patches, and work the blade edge-first rather than flat.
Brown Diatoms
The soft brown film that often appears in new tanks during the initial cycle. The felt side handles this easily. Diatoms typically disappear on their own after 4 to 8 weeks as silicate levels drop in a new setup. You don't need to scrape, just wipe.
Is the Flipper Max Worth It?
For tanks 75 gallons and up with glass 10mm or thicker, yes. The combination of a genuine scraper blade and the floating outer piece makes it significantly more capable and safer to use than cheaper alternatives.
For tanks under 40 gallons or with thin glass, the standard Flipper is a better fit and costs less. The Max's stronger magnets are harder to maneuver in tighter spaces, and the extra cleaning area is overkill when your glass panels are smaller.
If you're putting together a full equipment setup for a new tank and want to see how the Flipper Max fits into the broader picture, our guide to top aquarium equipment covers what to prioritize when budgeting for a new build.
Budget magnetic cleaners (generic brands under $10) are fine for very small tanks with light algae. For anything larger or harder, they lack the magnet strength to stay coupled on thick glass and usually don't have a scraper option.
FAQ
Will the Flipper Max scratch acrylic tanks?
The felt pad side is safe for acrylic. The scraper blade is not, and you should never use it on acrylic panels. Flipper sells acrylic-specific replacement pads. If you have an acrylic tank, stick to the felt side only and replace the pad before it wears thin.
What glass thickness does the Flipper Max work with?
The Flipper Max is rated for glass up to 15mm thick. Most standard aquariums up to around 150 to 180 gallons fall within this range. Custom tanks with very thick glass may require a specialty scraper or checking with the manufacturer.
How do I start the Flipper Max if the inner piece sinks to the bottom?
The inner piece is negatively buoyant by design. To retrieve it, bring the outer piece down the outside of the glass until the magnets catch and pull the inner piece up. You can guide it from the bottom of the tank back to wherever you want to start cleaning. This works fine as long as there's no significant debris or sand stuck to the inner piece.
Can I leave the Flipper Max in the tank all the time?
You can leave the inner piece in the tank. Most aquarists do. The felt and blade materials are inert and safe for fish and invertebrates. The outer piece is better stored dry outside the tank to preserve the grip material and prevent any long-term moisture damage to the handle.
The Bottom Line
The Flipper Cleaner Max is the right tool for larger tanks where you need both routine maintenance cleaning and the ability to scrape off harder algae deposits without pulling equipment out of the water and swapping pads manually. The floating outer piece and the dual-mode design are genuine improvements over the standard magnetic cleaner format. Keep the felt pad clean, never use the blade on acrylic, and work slowly on stubborn spots. That's really all there is to it.