Coral Box Cloud C9 Protein Skimmer


The Coral Box Cloud C9 is an affordable, controllable, and efficient protein skimmer and is ideal for 300-500 gallons of water volume.

2 in stock

SKU: cloudc9



The Coral Box Cloud C9 Protein Skimmer has an internal DC powered pump which greatly reduces its footprint. The Base has a diameter of 9″ and a 9.25″ x 12″ footprint including the gate valve. The skimmer is 24″ tall with a neck diameter of 4.75″. The Cup diameter is 9″ with a height of 6.25″.┬áThe skimmer cup has a drain that includes a drain hose and valve.


Every Coral Box protein skimmer includes a fully controllable Coral Box DCA skimmer pump. The pump includes a controller with 10 output modes, which allows you to adjust the flow rate from 10% to 100%. There are 3 feed timers, 10 minutes, 30 minutes, or 50 minutes with 1, 2, or 3 presses of the feed button respectively. Press the button a fourth time to end the feed timer and power the skimmer back up.

The Coral Box DCA pump also has a built in slow start feature, meaning it starts at 0% and slowly builds up in power until it reaches your flow setting. Every pump includes a float switch, which can be mounted directly into your skimmer’s collection cup. When the cup is full, it will shut your pump off and sound an alarm. The days of bubble filled sumps are over!

Every DCA pump is also Apex ready- they are built to accept a 0-10v control input (apex adapter cable sold separately).


The Coral Box Cloud C9 is powered by a sine-wave DC controller. Sine wave controllers use a specific electrical frequency to reduce noise while the pump is running. All you hear is the gentle intake of air and the resulting turbulence from the needle-wheel impeller.


The Cloud C9 uses less power the lower you run your pump. At full power, the Coral Box Cloud C9 consumes 50watts from the wall. At 50% power? 25 watts. They’re not only efficient in terms of power use. The Nautilus DC pump allows you to dial in your skimmer on a level unmatched by AC pumps. That means you can dial in your skimmer to match your tanks specific needs.

The Coral Box Cloud C9 Skimmer works on:

Light Stocked Tanks up to 500g

Medium Stocked Tanks up to 400g

Heavily Stocked Tanks up to 300g

We provide a 12 month USA warranty on all Coral Box DC Skimmers.

Ships From and Serviced in Rhode Island, USA

Additional information

Weight 17.2 lbs
Dimensions 27.5 × 15 × 11.5 in


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