AquaMaxx FC Protein Skimmers Compared: FC-80, FC-120, FC-180, and FC-280

Introduction

The AquaMaxx FC line covers four protein skimmers: the FC-80, FC-120, FC-180, and FC-280. All four are built around the same idea, pairing a compact body with features that usually cost more, and they sit at a budget price point that makes them worth a serious look for reefers who want capable skimming without a large outlay.

Every model in the range shares the same core hardware. That includes a single piece cellcast acrylic wine bottle body, an internal Sicce Syncra pump, a specialized bubble diffuser, a slim water gate, an adjustable air silencer, and a twist off collection cup with a carry handle and a clear dome lid.

What separates the four models is capacity and footprint. AquaMaxx rates each skimmer for a tank volume that already accounts for the heavy biological loading most reef systems carry, so the right choice usually comes down to matching that rating to your display and confirming the body will fit your sump.

This guide walks through what the whole lineup gets right, then breaks down each size so you can judge which one fits a given tank and sump layout.

What Every FC Protein Skimmer Shares

Opening the box, you get the skimmer body, a collection cup, a Sicce Syncra pump with a Venturi, a bubble diffuser, an air silencer, some tubing, and an installation guide. Assembly is quick, and because the pump sits inside the body, the finished skimmer stays compact.

Materials and detailing hold up well for the price. The body is a single piece of cellcast acrylic in a wine bottle shape, finished with translucent blue accents, rounded and polished edges, and a laser cut AquaMaxx logo rather than a sticker. The recessed base creates a lip that helps you line the body up and keep it steady, and the collection cup twists off using a handle that is comfortable to grip. Metal screws replace the nylon thumb screws often found on budget skimmers, and the larger rubber feet are fastened firmly to the base instead of pressed into place.

Tuning uses two controls. The air silencer also works as a valve: a blue marker at its base shows which direction increases or decreases airflow, and you can tighten its screw to lock in a stable foam once you find the right setting. The slim water gate then sets the water level inside the body, and its knob turns smoothly with plenty of threading for precise adjustment. Because the gate has no markings, photographing the knob position or marking the threads is the simplest way to remember a setting that works.

Collected foam rises up the neck and meets the clear dome lid of the collection cup. The dome shape guides foam into the cup and gives a clear view of the foam from above. Its vents are large but face inward toward the dome with plenty of clearance, which helps stop a full cup from pushing foam up through the lid and down the outside of the skimmer.

Routine maintenance is straightforward. A full cup twists off and lifts away by its handle for rinsing at the sink, and for deeper cleaning nearly every part of the skimmer separates, which makes hard to reach areas much easier to access. Everything goes back together cleanly, and the components hold good tolerances, so the parts settle into position as you tighten the screws.

AquaMaxx FC-80: The Compact Choice

The FC-80 is rated for tanks up to 70 gallons with a heavy bioload, making it the smallest skimmer in the range. Its footprint is roughly 7 by 7.75 inches, which keeps it well suited to nano and mid-size reef systems where sump space is at a premium.

Thanks to the internal pump and the slim water gate, the body stays narrow enough to sit comfortably in most standard sump chambers with room to spare, and it should still slip into compact sump designs without a struggle.

For smaller tanks, the appeal is that a capable skimmer does not have to take over the sump. The twist off cup and carry handle also keep the emptying routine quick, which matters when the skimmer sits inside a tight cabinet.

AquaMaxx FC-120: A Step Up in Volume

The FC-120 is rated for tanks up to 100 gallons with a heavy bioload. It uses the same pump, diffuser, air silencer, and water gate as the rest of the family, so tuning behavior and cup removal feel the same as on the FC-80.

This model sits in the middle of the range and makes sense for reefers whose systems are already stocked heavily, or who expect to add more livestock over time. Moving up from the smallest model buys extra capacity rather than extra complexity.

AquaMaxx FC-180: Room for Larger Reefs

The FC-180 is rated for tanks up to 130 gallons with a heavy bioload. It is the natural next step for a system that has outgrown a 100 gallon rating, and it keeps the same compact proportions as the smaller models, so it should still fit standard sump chambers without crowding out other equipment.

Because the collection cup, dome lid, and gate mechanism are shared across the range, the day to day routine does not change as you move up in size. Emptying the cup still takes a twist and a lift, and the two point tuning process stays exactly the same.

The 130 gallon rating is the main reason to choose this size, since the rest of the ownership experience matches the smaller models in the lineup.

AquaMaxx FC-280: The Largest FC Model

The FC-280 sits at the top of the range with a rating for tanks up to 240 gallons under heavy bioload. Even at this size, the skimmer stays reasonably compact, with a footprint of roughly 9.5 by 11 inches, so it should fit most standard sumps with room to spare and still work in tighter sump designs.

None of the shared features are sacrificed for capacity. The FC-280 keeps the wine bottle body, the internal Sicce pump, the bubble diffuser, the air silencer, the slim water gate, and the twist off cup with its clear dome lid.

Overall Buying Advice

Since all four models use the same components and the same two tuning points, the decision comes down to rated volume and physical fit. Match the skimmer to your tank using the heavy bioload ratings: 70 gallons for the FC-80, 100 gallons for the FC-120, 130 gallons for the FC-180, and 240 gallons for the FC-280.

On space, the internal pump and slim gate design mean every model in the lineup should settle into most standard sump chambers with room to spare. If your cabinet is genuinely tight, the FC-80 is the safest fit, while the FC-280 covers large systems without an oversized housing.

Two small habits make ownership easier. First, record the water gate position once you have the foam dialed in, either with a photo or a mark on the threads, since the knob has no markings. Second, plan on a periodic full strip down, because nearly every part separates and that makes deeper cleaning far less tedious than it is on skimmers that do not come apart as easily.

Conclusion

The AquaMaxx FC range does the fundamentals well: a compact wine bottle body, an internal Sicce pump, a bubble diffuser, a slim water gate, an adjustable air silencer, and a twist off cup with a clear dome lid, all at a budget price point. Choosing between the four is mostly a matter of tank volume and sump clearance, and any of them should suit a reefer who wants reliable skimming without paying premium money.