Lime Water Reactor KWR 250, used unit

Inside of the reactor KWR a rigid circulation pump realizes that the suspension (mixture) of water and calcium hydroxide powder is in abeyance. Above this white lime milk there is the clear lime water solution. The incoming reverse osmosis water (or very soft water) reacts inside of the KWR immediately with calcium hydroxide, that flows into the aquarium.

The aquarium water is enriched with calcium ions. Because of the very high pH value of the lime water (12-13) the pH of the aquarium water is slightly lifted. At the drip-in point of the lime water precipitation occures. The forming hydroxylapatite entrains phosphate. So the phosphate concentration in the aquarium water is reduced (phosphate precipitation).

• reactor with rigid circulation pump
• detailed mounting and operation manual
• 3 kg calcium hydroixde powder, quality "pure"

Maximum aquarium size: 7000 litres / 1850 USgal (depending on daily evaporation rate; oversizing of the KWR enlarges the maintenance-free time)
Operation: external or in filter sump
Diameter: 250 mm
Volume: 34 litres
Foot print size: 430 x 370 mm
Total height: 77 cm
Materials: PVC, ABS, PA, NBR
Weight: 20 kg
Built-in pump: Eheim 1250
Electrical connection: 28 W, 230 V 50 Hz (others on request)
Connector feed water: 6/4 mm hose
Connector outlet: PVC nozzle 16, PVC d20
Connector drain: ball valve 20
Maximum calcium hydroxid filling: 2700 g
Lime water quantity per filling at 25°C: 1700 litres
pH value of out-coming water: 12 to 13
Calcium concentration of out-coming water: 720 mg/l (15°C/59°F), 690 mg/l (20°C/68°F), 670 mg/l (25°C/77°F)
pH electrode: in series
WEEE-Reg.-No.: DE80560390

Leaflet

Instruction manual

Info: Safety data sheet "Calcium Hydroxide"

Info: Dosing "Kalkwasser"

Info: Methods for rising KH and Calcium

Info: Sodium hydrogen carbonate in the KWR

FAQ: Calcium hydroxide reactor - "kalkwasser" reactor

Spare impeller for Eheim pump
Pump bypass ball valve (blue-white)
Plastic PA hexagonal screw M10x30

Calcium Hydroxide solution („Kalkwasser“) is a strong alkaline substance. Children should never reach the powder nor the solution. At contact with eyes or skin flush with much water and go to the doctor (take the label of the Calcium Hydroxide with you).

Safety data sheet "Calcium Hydroxide"