Prime Mini In-line Chillers

Precision temperature control at your fingertips. In-line chiller features leading-edge titanium heat exchanger and a high-efficiency compressor for superior cooling in a sleek space-saving design. Ideal for smaller aquariums with high cooling demands such as a small reef aquarium. Integrated digital temperature controller accurately maintains chiller temperature, as well as optional submersible aquarium heater temperature. Simply plug a heater (up to 300 watts) into the back heater outlet for total water temperature regulation. For fresh and saltwater aquariums. Requires appropriately sized water pump and tubing (sold separately) with return device. For aquariums up to 50 gallons.

Mini In-line Chillers are ideal for smaller aquariums with high cooling demands such as nano reef aquariums up to 50 gallons. Uses ozone-friendly R-134A refrigerant.

Sorry, not available in California.

Please click on "More Information" for installation instructions and programming.

* FREE shipping is for STANDARD GROUND SHIPPING for the 48 connecting states. Not available for air shipment.

1. Remove accessories and plumbing fittings for inlet and outlet.
2. Slide chiller from box and inspect for damages.
3. Place chiller in desired location. Make sure the chiller is placed on a firm, level surface in a location that has plenty of ventilation* and will not be exposed to salt or saltwater.
4. Assemble the water inlet and outlet to the chiller. Ensure the seal ring is properly seated.
5. Connect external flexible hoses to the inlet and outlet. After connecting hoses, tighten the metal screw clamps to ensure hoses do not disconnect when in use.
6. Before turning on chiller, ensure the following: a) Flow water through the chiller for approximately 30 minutes to ensure there is no water leakage. b) Make sure the pump will operate normally without any blockage. c) Make sure the chiller is plugged into a ground fault circuit interrupter (GFCI) protected 110V power outlet.
7. Set the temperature controller to the desired temperature as instructed next.

*Requirements for proper ventilation:

a) Back/Sides: Condenser (radiator) requires at least 24" clearance to allow air into the chiller.
b) Front: Requires at least 24" clearance to allow for proper airflow.
c) Chiller must NOT be placed in a closed closet or cabinet.
d) The warm air from the chiller must be completely evacuated from the chiller location. A fan may be necessary to draw warm air away from the chiller. The maximum operating temperature is 95°F.

Programming Temperature Controller

Chiller Temperature Adjustment

1. Plug the chiller into a GFCI protected outlet. The power switch will come on and the digital controller will display the actual water temperature. The "POWER" light will illuminate.
2. Press "SET" to set the desired temperature. Press the UP arrow to increase temperature and press the DOWN arrow to decrease temperature. The default temperature differential is 2°F; therefore, the chiller will begin to operate at a temperature that is 2°F less than the actual water temperature.
3. The digital display will resume showing the water temperature after a 5 second delay. The chiller will then enter a delayed start-up mode that lasts 2-3 minutes before it begins normal operation.
4. Setting the temperature differential. a) Press "SET" for ten seconds. The letter "D" will jump on the digital display indicating that the adjusting function is in a ready state. b) Press the UP arrow or the DOWN arrow to adjust the starting temperature differential. The differential can be adjusted from 2°F to 3°F or 4°F.
5. When chiller is in operation, the "COOL" mode light will illuminate.

Heater Controller System

1. The Prime Chiller features an external heater port that allows any 110V submersible aquarium heater, up to 300 watts, to be controlled by the chiller's temperature controller. It is recommended to set both the temperature controller on the heater and on the chiller to the same temperature.
2. Install the submersible heater into the sump or aquarium. Ensure that a drip loop is in place so that water cannot drip into the heater port.
3. Plug the heater into the port on the back of the chiller. The default temperature differential is 2°F; therefore the heater will begin to operate at a temperature that is 2°F lower than the set water temperature.
4. When heater is operating, the "HEAT" mode light will illuminate.

Safety Note:
Ground Fault Circuit Interrupter (GFCI) Protection
To comply with the National Electrical Code (NFPA 70), and to provide additional protection from the risk of shock, this unit MUST be connected to a ground fault circuit interrupter (GFCI) outlet at all times. Do not use extension cords. Warning - To reduce the risk of electrocution, keep all connections dry and off the ground. Do not touch plug with wet hands.

Michael Willoughby
Lawrence, KS

Absolutely perfect. Very quiet little chiller. I bought the 1/10th HP and am very pleased. It was very easy to install and was up and running in about 20 minutes.

Donn Calkins
Wellington, CO

A terrific little chiller. I have the 1/15HP hooked up to my 24g Aquapod reef tank. It is far quieter than I expected (no more noisy than the fans on the hood). It brings a lot of peace of mind.

Jeff Haupert
Hollywood, CA

I purchased the Prime 1/10th for my 65 Gal reef tank. I also have a 15 gallon Berlin sump, totaling 80 gallons of water. I'm running three 96 Watt VHO bulbs with a closed hood. I also have about 75 watts of submersible pumps in the sump. Delivery was fast and the product was packed well - no damage. It took 15 minutes to set up and an amazing 45 minutes to go from 82.6 degrees to 79 degrees. The built-in thermometer is very accurate; I set the unit to 79 degrees that’s what I got. The unit is VERY quiet! I’m pleased with my purchase.

Michael Ronzetti
Miami, FL

What an amazing product. I am running a 150 watt Aquapod, and it ran at around 83.5 without the lights, 89 with them on for only a few hours. I needed a chiller that I could trust, and the 1/15th HP Prime does the job great. It come on for maybe two hours out of the day, but I actually have to put my ear next to it to hear if it is on or not. Extremly quiet, powerful, almost a necessity for reef tanks 30 gallons and under.

Miriam Shoshana
S. Austin, TX

My highest recommendation! I just bought this, my first chiller (have been doing this for about a year), and hooked it up yesterday. I have a 60G marine reef + both wet-dry AND cannister filters, so including live rock and sand, my tank holds about 43 gallons and the filter maybe 10 + my cannister filter about a gallon. So, my set-up holds over 50 gallons. The tech I spoke to here helped me figure out plumbing and then suggested the 1/15 instead of the larger one, since my total volume was so close to 50. After I hooked it up (very easy), it took about 2 hours or less for my tank (set-up: Ice Cap 660 Ballast retrofit with 4 T-5's, a 3000 Quiet One pump for the wet-dry, a 350 Marineland Cannister, a 200 watt titanium heater, 3 Maxi-jet 1200's, 1 Maxi-jet 600 (attached to my plenum) and a wave maker together generated so much heat. I had 3 fans pointed into the aquarium, and still the temp held, even at night at over 81. I had been getting up during the night and several times a day dumping DI (water) ice cubes into the tank. Last night, I finally got to sleep all night! I had misgivings after not getting the larger chiller when I received it, but I set it at 79, and it has held at 79 degrees F. I'm disabled and it was very difficult to save the money for this. It was worth every penny for the peace of mind! A great product for an affordable price- especially for someone like me! The techs here KNOW THEIR STUFF! THANKS!