Outstanding savings and setup ease when you supply the calcium hydroxide. Two Little Fishies KW Reactor 300 Pump Only Kit builds upon the KW Reactor 300 by adding a perfectly matched pump and plumbing supplies. Smart and budget-savvy solution for reef hobbyists wanting to automate calcium hydroxide supplementation that already have a supply on hand.
Upon installation, Two Little Fishies KW Reactor 300 automatically mixes calcium hydroxide and dispenses a supersaturated Kalkwasser solution to replenish calcium and maintain alkalinity vital for the health of reef aquarium corals, clams, and calcareous algae that build skeletons of calcium carbonate. Mount hanging unit on your aquarium or sump for convenient installation. For saltwater marine reef aquariums up to 300 gallons.
Pump Only Kit Includes: KW Reactor 300, 5ft length of 1/2" diameter flexible vinyl tubing, Marineland Maxi-Jet PRO 1200 Water Pumps, and (2) Herbie Clip "G".
||Use with up to a maximum of 1/2 cup calcium hydroxide powder (=24 teaspoons)
||20 gallon Minimum
300 gallon Maximum
||7-1/4" x 5-1/2" x 15-1/4" high
Two Little Fishies KW Reactor 300 Instruction PDF.
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Shop all Aquarium Filter Media Reactors.
Important Notes: Do not restrict flow out of the exit pipe, which must flow downward. Do not submerge the outlet. If dosing directly into aquarium, there must be strong circulation to avoid concentrating kalkwasser on invertebrates. Dose in sump only where strong water movement will quickly disperse it.
Description: The KW Reactor 300 creates saturated kalkwasser solution every time the feed pump is switched on to replenish evaporated water. Gentle mixing is achieved with a rotating sprinkler head that is "powered" by the pressurized water feed.
1. Preparing the Reactor
Open Reactor Lid by turning counterclockwise. Check parts list to confirm that all parts are present. The reactor is supplied with all the parts needed to operate it, EXCEPT the hose and pump and a switching device (level switch or programmable timer). The pump used can be any powerhead with a flow rate approximately 200 to 400 gal/hr. Higher-capacity pumps are needed for high head installations.
Connect the Center Pipe to the Sprinkler Head and the Reducer Fitting using the short Silicone Hose Pieces. The connections should be close and it may be necessary to briefly heat the Silicone Hose in hot water so that it slips onto the pipe easily. Connect the 1/2" end of the Reducer Fitting to one of the soft 90-degree Elbows. Insert the wider end of the short Pipe Adapter into the other end of the soft 90 degree Elbow and insert the entire assembly into the Reactor Column. The Pipe Adaptor fits into a hole located inside the top portion of the reactor at the positions of the Barbed Hose Connections. Make sure the Sprinkler Head hangs to the center. Add RO water to fill the Reactor approximately 3/4 full.
1a. Water Input and Output
The Input and Output locations depend on where the user positions the short Pipe Adaptor. Normally the output is located over the Hanger so that it can flow directly into the sump or aquarium. NOTE: Do not restrict flow out of the Exit Pipe. There should be no long run of hose on the output that could collect water and block free flow. The outflow MUST flow downward. The supplied short length of 1/2" Hose used with Connector and a soft 90-degree Elbow extends the connection over the rime of the aquarium or sump. To extend the reach of the outlet, a length of 1/2" hose can be used BUT it MUST be as short as possible and run straight so that water cannot collect in the line.
Inside the top of the Lid, there is a Flat Plastic Washer and on top of it, an O-Ring. Rotate Lid on the threads until it stops (hand-tight) to close the Reactor. It is not necessary to seal the Reactor since it is not pressurized and will not leak, even if the Lid is removed while the Reactor is operating. Do not over-tighten. The Flat Plastic Washer allows slippage and makes it easier to open the Reactor. It is otherwise not necessary.
2. Locating the Reactor
The KW Reactor 300 can be seated upright inside the filter sump, hanging on the side of the sump, on the side of the reservoir, or the rear of an aquarium. For hanging installations, use the screw provided in the Base Plate to level it against the aquarium or sump wall. The reactor must be upright and level to operate properly. The Reactor outlet must be higher than the sump or aquarium where the kalkwasser is being sent. Typically, the outlet is hung over the sump.
3. Connecting the Check Valve
Use 1/2" ID Hose to connect the Check Valve in the water feed line. Be sure to use the correct diameter hose so that the Check Valve fits snug in the Hose. Note the small arrows on the Check Valve, which shows the direction of water flow. Note that the Check Valve can be opened for cleaning by rotating the center part of its body. Caution: Rotating either the Hose or Pump could open the Check Valve. For this reason, the Check Valve is best located inside the reservoir and close to the pump.
4. Connecting the Pump and Check Valve to the Reactor
Use a length of 1/2" Hose to connect from the Check Valve to a Barbed Port on the inside of the Reactor. A Barbed Connector and a soft 90-degree Fitting may also be used to connect the Hose to the Barbed Port. Plastic Hose Clamps may be used to secure the barbed hose connections and the connection to the pump. Plastic zip ties can be used instead of clamps.
5. Initial Operation and Adjustment
Once the Reactor is level, all of the Hoses are securely attached, and the pump with Check Valve on the output is located in the fresh water reservoir, direct the water output into the sump (or aquarium), and connect the Pump to the electrical outlet to purge air from the line and allow water to fill Reactor. The average operating flow rate of 5-1/2 gal/hour is caused by the restrictions in the piping and Sprinkler Head. Higher flow rates are possible with higher-pressure pumps, though kalkwasser dosing is best done as slow as possible. Disconnect power and observe to verify that the Check Valve prevents backflow.
6. Auto-Top Off System
The KW Reactor 300 must be used with a switching device to turn the pump on for short intervals, achieving a top off of evaporated water. The switching can be accomplished with a level sensor or programmable timer capable of having intervals as short as one (1) minute. It is important to note that when using a Level Sensing Switch, there is a risk of overdosing because the switch may remain ON if there is a leak in the aquarium, or if something else prevents the switch from returning to the OFF position. Even the use of two level switches, which safeguards the failure of one, cannot prevent a continuous ON switch caused by a leak in the plumbing. Timers are safer. It is also possible to combine a timer and level switch. With a timer, a simple starting sequence is one minutes dosing each hour. Adjust the ON time (2 minutes Max) and/or the number of ON periods (Twice per hour Max) to match evaporation.
7. Addition of Calcium Hydroxide Powder
Below table shows how much calcium hydroxide powder to add to the Reactor every week or two based on the evaporation rate in US gallon.
Recommended calcium hydroxide addition measured in cups based on evaporation top-off rate. Note: Saturated Kalkwasser contains 2-teaspoon calcium hydroxide per gallon. 48 teaspoons = 1 cup. The above table uses excess calcium hydroxide to assure saturation is achieved. *For amounts over 1/2 cup per 2 weeks, split the amount and add it once per week.
8. CO2 in the Freshwater
CO2 dissolved in the fresh water pumped into the Reactor converts the CaOH2 into calcium carbonate that accumulates and must be decanted periodically. This can be prevented by placing a lid on the freshwater reservoir and aerating it with air that has been pumped through Two Little Fishies CDX Media (Item# 81373, 74 pcatid=24984), which absorbs CO2.
Observe the Reactor at least once per week to verify the Check Valve is working. Observe the exposed opening of the outflow pipe to be sure that it is not blocked by calcium carbonate deposits, and clear it as often as necessary - usually every few months. Use of the soft 90-degree Elbow or hose there makes this easy: just squeeze the end. Two Little Fishies NanoMag (Item# 70388) can be used to clear off calcium carbonate deposits that will coat the walls of the Reactor. At least every few months, the Reactor should be cleaned. Disconnect the Feed Hose by pulling the soft 90-degree Elbow Fitting off of the Barbed Connector or Port. Place Reactor inside a bucket to catch any spilled water. Unscrew the top. Pour the water and residual calcium hydroxide from the Reactor into a sink. Rinse with tap water, and soak the Sprinkler Head and Check Valve briefly (5 minutes) in vinegar to remove any calcium carbonate deposits. Reassemble the Reactor per instructions and follow the initial operation and adjustment procedure.