Click to enlarge

Unless otherwise stated, product might differ from image as image is representative of species and not of actual product

Filters/Filter Media

RowaKalk

Name: RowaKalk
SKU: 33606
Price: 53.90 SGD
Availability: InStock

SGD 53.90

Product Variations

Quantity

Stock: 10

Product Description

Kalkwasser translates from the German for limewater and is one of the oldest and most widely established methods of adding calcium to the reef aquarium as first introduced by Peter Wilkinson a Swiss aquarist.

Kalkwasser is a solution made by dissolving Calcium Hydroxide in water. The resultant fresh solution is alkaline with a pH of 12.4 and contains a ready supply of both Calcium ions and Carbonate ions.

Both of these ions are useful to the aquarist as the Calcium ions are available to the corals and the Carbonate ions help to buffer the pH. In addition to adding calcium, Kalkwasser also has the benefit of adding hydroxide ions, which react to neutralise organic acids in the aquarium that otherwise would exhaust the buffering capacity of the system, thus countering the natural tendency within the aquarium towards falling pH. It also helps precipitate phosphates from the water, which fuel nuisance algae growth and inhibits calcification of stony corals.

Kalkwasser contains no other ions that would otherwise cause an imbalance in the water chemistry.

If the evaporated water loss is from the aquarium is replaced with kalkwasser then it will add calcium and offer the other benefits described above. The solution however is highly reactive with CO2 in the air forming insoluble calcium carbonate. The reaction with CO2 significantly reduces the free calcium ions from 900mg/l in the fresh solution at pH 12.4 to 5-6mg/l at pH 10.

For this reason it is necessary to continually make a fresh solution and to keep it away from the atmosphere. This is where a Deltec Kalkwasser stirrer may come in to play as it makes up fresh saturated solution as it is used up.

Note that great care must be taken when administering Kalk due to the great affect that it has on the pH of the aquarium.

Kalkwasser is ideally dosed after the lights have gone out on the aquarium to counter the natural drop in pH which occurs when photosynthesis stops.

RowaKalk

You May Also Like

Rio Ammonia Pad 25.5x46cm

Aquarium Systems Waste Away Ge..

ANS Mini Bacteria House 2.5cm ..

Black Mini Lava Rock (Options ..

MARINEPURE GEMS 3/4-INCH BIO F..

ORCA LABS Diamond-Carbon ULTRA..

BOYD Chemipure ELITE (crystal ..

N30 PREMIUM BIO PINION FILTER ..

Ocean Free Superior Bio-Foam C..

CaribSea Arag-Alive Fiji Pink

SEACHEM MATRIX CARBON 250ML (S..

TUNZE COMLINE REEFPACK 100

Back to Nature Aquarium Cleane..

Seachem Tidal 55 Zeolite 145g

BIOHOME ULTIMATE FILTER MEDIA ..

SHIRUBA CARTRIDGE REPLACEMENT ..

Seachem Purigen

Ocean Free 3DM Tetris (Options..

Aqualex Ceramic Cylinder M 1L

UP AQUA D-SF-F external filter..

SEACHEM POND MATRIX 4L (SC-211..

Powerhouse Filter Media: Soft ..

Seachem Matrix

NT LABS Aquarium Ammonia Remov..

CARIBSEA BIOMAGNET CLARIFIER 1..

Ocean Free 3DM Ring S (Options..

Fauna Marin NPO REDU PELLETS 1..

NT LABS Aquarium Activated Car..

Sera Filter Wool 500g

BOYD Chemipure (clears crystal..

Orca OrganEX Micro

N30 Premium Bio Black Ring 300..

N30 PREMIUM BIO WHITE FILTER M..

Eheim Professional 3 Filter Pa..

GEX REPLACEMENT MEDIA FOR SILE..

ANS Polyster Blue Wool 100x50x..

Aquaforest Life Bio Media 1000..

YEE Cube Filter Media By Activ..

ANS SinoBall 0.5/1.5kg (w/ Fil..

Fauna Marin Ultra Phos (Alumin..