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Product description
A concentrated KH buffer in the form of a supplement for marine and reef aquariums.


General information
High performance alkalinity (KH) water solution.
It helps to maintain the pH balance in the tank by increasing the alkalinity of the water.
Is the source of carbonates that make up the majority of aragonite by weight? a mineral used by reactive organisms to build the skeleton of a coral reef.
The cyclical use of the preparation increases the pH to a level of 8.3 (at this level the pH remains constant, and only the degree of water alkalinity increases).
Over 50% more concentrated than most competing products.
Does not contain phosphates, silicates or organic substances.
Formula developed by specialists in the field of marine sciences.

Available capacities
250 ml
500 ml
2 years
20 years

Detailed information
Alkalinity, also known as carbonate hardness or buffer capacity, is a way to determine the pH balance in a solution, e.g. aquarium water. Due to the direct way in which it affects the pH of water, alkalinity is a factor of great importance in marine aquariums. Weak acids formed as a result of oxygen exchange and decomposition of organic material in the tank affect the gradual reduction of water alkalinity. Failure to control the degree of alkalinity of water may lead to a situation in which it falls below the critical level, which in turn may result in a rapid increase in the pH level fluctuation (daily fluctuation of the pH level within +/- 0.2 units is normal in marine aquariums) and in as a result, cause stress to living sea creatures. Alkalinity is also reduced due to the activity of re-forming organisms, more precisely during the production of aragonite (by weight consisting of about 60% of carbonates), which is why it is a very important element affecting the rapid growth of these organisms.

Maintaining carbonate hardness in marine aquariums at a level of 7 to 12 dKH (2.5 to 4.3 meq / l) will basically keep the pH level in the range we want. The rate at which the level of alkalinity in water decreases depends on such factors as: the density of reactive organisms in the reservoir, the type of lighting, the speed of water circulation and other biological, physical and chemical conditions. Therefore, each aquarium requires a slightly different, individually selected scale of supplementation with a buffering agent. Fortunately, after determining the rate of decrease in alkalinity in aquarium water, you can easily calculate the correct dose of the preparation. To create a stable ionic economy in the reservoir and obtain the parameters of natural sea water necessary for the development of the reef, it is recommended to use high-quality salt mixtures with an appropriate (not over-dried) buffering effect, as well as the right concentration of macro and microelements and trace elements.

All liquid supplements from Brightwell Aquatics to improve water quality have been created on the basis of purified water and ingredients with a high degree of purity. Brightwell Aquatics develops preparations based on empirical data, using observation and results of specific measurements – not based on theory.

Instructions for use
Basic information: Shake well before use. Use the preparation without exceeding the daily dose of 5 ml (one cap) on approximately 114 l of water until the desired degree of alkalinity is reached. Then dose once a day or once a week as needed (details below) to maintain alkalinity in the range of 7 to 12 dKH. Applying the above recommendations, 250 ml of the preparation is enough to treat about 5678 l of water.

Extended information: Before supplementation, check the level of alkalinity in the tank with a thorough water test. Shake well before use. 1 ml of Alkalin8.3 increases the alkalinity of 3.8 l of water by 3.1 dKH (1.1 meq / l). If the initial level of alkalinity in the aquarium water is less than 7 dKH (2.5 meq / l), use the preparation in maximum proportions of 5 ml for approximately 37.8 liters of water daily until the desired degree of alkalinity is achieved. Then dose once a day or once a week as needed (details below). To make smaller changes in the level of alkalinity, use 5 ml of Alkalin8.3 (one teaspoon) in approximately 113.5 liters of aquarium water as needed to keep the degree of alkalinity within the appropriate range. Try to keep the water alkalinity within +/- 1 dKH. To determine the rate of decrease in alkalinity after reaching the desired level, measure alkalinity at the same time each day for 7-14 days. To determine the daily dose of the preparation (more recommended than weekly) necessary to maintain a certain alkalinity, it is necessary to: determine the total amount of water in the aquarium system, divide the daily decrease in alkalinity by 3.1, using dKH as the unit of measurement (or by 1.1 when the unit of measure is meg / l) and then multiply the number obtained in this way by the amount of water in the tank expressed in gallons (where 1 gallon = 3.8 l of water) to obtain the daily dose in milliliters required to maintain a constant level of alkalinity. Daily use of the preparation in appropriate doses allows you to maintain a more stable level of alkalinity and pH of water (and as a result create a more natural ecosystem) than weekly dosing, when alkalinity reaches a peak only immediately after administration of the preparation and gradually decreases on subsequent days of the week.

Note: If the pH of the water does not reach the desired level when using the preparation as recommended, e.g. due to insufficient gas exchange occurring in the aquarium, it may be necessary to use a pH increasing product (Brightwell Aquatics pH +). Follow the instructions and recommendations for the use of each preparation.

Purified water, inorganic bicarbonate, carbonate, sulfate and borate salts.


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