Melpool Chlorine Shock 55G – 1 kg

The Melpool Chlorine Shock 55/G – 1 kg is a fast-dissolving chlorine granulate for the powerful disinfection of swimming pool and spa water. The product contains at least 55% active chlorine and is particularly suitable for a chlorine shock, for example at the start of the swimming season, after intensive use, or when the water starts to turn green or cloudy. In addition, Melpool 55/G can be used for the regular disinfection of the water. 

Quickly increase the chlorine level

When the free chlorine level is too low, bacteria, algae, and other micro-organisms can develop more easily. Slow-dissolving chlorine tablets are then not always sufficient to restore the chlorine level quickly.

Melpool 55/G consists of fast-dissolving granulate, which allows you to significantly increase the chlorine level in a short time. This makes the product ideal for a shock treatment. It is suitable for, among other things:

• green or starting-to-turn-green swimming pool water;
• visible algae growth;
• a chlorine level that is too low;
• cloudy water due to organic pollution;
• the first treatment when starting up the swimming pool;
• intensive use or prolonged hot weather;
• restoring water quality after a period without sufficient disinfection.

If algae are present, Melpool recommends first brushing the walls and floor well and then applying a chlorine shock. 

Stabilized chlorine for outdoor pools

An important advantage of Melpool 55/G is that it contains stabilized chlorine. The stabilizer present helps prevent the dissolved chlorine from breaking down too quickly under the influence of UV radiation. This makes the product particularly practical for outdoor pools that are exposed to a lot of sunlight. 

Please note that with prolonged use of stabilized chlorine, the cyanuric acid level can increase. A concentration that is too high can reduce the effectiveness of the chlorine. Melpool therefore advises not to let the cyanuric acid level rise above 70 ppm and to refresh part of the swimming pool water if necessary. 

Suitable for both pool and spa

According to the manufacturer, Melpool 55/G can be used in both pool and spa water and is suitable for both soft and hard water. This allows one package to be used for different types of water treatment. 

Dosage Melpool Chlorine Shock 55/G

For optimal effectiveness, the pH value must first be brought to between 7.2 and 7.6. For a normal maintenance treatment, Melpool recommends approximately 20 to 30 grams per 10 m³ of water, every 1 to 2 days. For a chlorine shock or in the presence of algae, approximately 100 grams per 10 m³ of water is recommended. 

As a guideline, approximately 18 grams of Melpool 55/G per 10 m³ of water increases the chlorine level by about 1 ppm. The actual required amount may vary due to, among other factors, water temperature, sunlight, pollution, and the number of swimmers. 

Examples for a chlorine shock of 100 g per 10 m³:

How to use Melpool 55/G

First, check and correct the pH value. Then, dissolve the required amount of chlorine granulate in a bucket of lukewarm water and distribute the solution evenly over the water surface. Keep the circulation pump running during the treatment.

Do not throw the granulate directly onto the pool floor. A high local chlorine concentration can damage the floor or liner and cause discoloration. Furthermore, never mix chlorine directly with other pool chemicals or other types of chlorine.

After a chlorine shock, the pool may only be used again once the chlorine level has dropped below 5 ppm, according to Melpool. Therefore, always check the water with a suitable tester before swimming again.

The Melpool Chlorine Shock 55/G – 1 kg is therefore a versatile chlorine product for those who need to intervene quickly in case of a chlorine level that is too low, algae growth, or contaminated swimming pool water. Due to the combination of fast-dissolving granulate and chlorine stabilization, it is particularly practical for outdoor pools, while it is also suitable for spas and regular disinfection. 

Note: use biocides safely. Always read the label and product information before use and follow the dosage and safety instructions on the packaging.