DRAK pH/KH-Minus - reduce pH and KH quickly and easily
Convenient and safe reduction of carbonate hardness in fresh water
Many fish and plants from areas with soft, slightly acidic water feel much more comfortable with a lower carbonate hardness (KH). In contrast, the total hardness (GH) only plays a significant role in rare cases.
With DRAK pH/KH-Minus you have a simple and uncomplicated way of reducing the carbonate hardness permanently without having to purchase expensive and complicated equipment.
It utilises the effect that any acid stronger than carbonic acid converts (hydrogen) carbonates in the water into carbonic acid. The released carbonic acid (CO₂) volatilises after some time and is also used for plant fertilisation in the meantime.
Application
Please first determine the pH value and carbonate hardness of your aquarium water using commercially available tests or, in the case of pH, using a pH meter.
Before using DRAK pH/KH-Minus please refer to the literature on the target values to aim for.
- If the pH value is above 7.0 and the KH is above 6° dKH, add 10 ml of DRAK pH/KH-Minus to 40 litres of water directly into the aquarium.
- If the pH value is less than 7.0 and / or the KH is below 6° dKH, add a maximum of 2 - 4 ml of DRAK pH/KH-Minus to 40 litres of aquarium water.
The next day, measure the pH value and KH again. If necessary, add DRAK pH/KH-Minus again.
Important
The pH/KH reduction may only be carried out gradually. The maximum daily dose must not be exceeded under any circumstances. Otherwise you risk damage to animals and plants due to the strong CO₂ development. Please add the solution well diluted with aquarium water (at least 10 times the amount) slowly at a point in the aquarium where the water movement is sufficiently high to ensure immediate mixing with the rest of the aquarium water.
Especially with a higher carbonate hardness (greater than 10° dKH), you should expect to have to add DRAK pH/KH-Minus over several days until the desired reduction is achieved.
As a rule of thumb, you can expect to lower the pH by approx. 0.3 units if you halve the KH while maintaining the same CO₂ concentration.
Contents
DRAK pH/KH-Minus contains approx. 5.1 % sulphuric acid
Each litre is sufficient for approx. 3,000 HL (hardness litres) - i.e. you can reduce the carbonate hardness of 600 l of water by approx. 5° dH with one litre.
Phosphate-free!
Possible dangers
- Keep out of reach of children!
- Caution: reacts strongly acidic
- Please wear protective goggles and gloves when using the product
Pictograms
Signal word: Danger
Hazard statements
H290 May be corrosive to metals
H314 Causes severe skin burns and eye damage
H319 Causes serious eye irritation
Precautionary statements
P260 Do not breathe dust / fume / gas / mist / vapour / aerosol
P280 Wear protective gloves/protective clothing/eye protection/face protection
P301 + P330 + P331 If swallowed: Rinse mouth. Do not induce vomiting
P303 + P361 + P353 In case of contact with skin (or hair): Take off immediately all contaminated clothing. Wash skin with water [or shower]
P305 + P351 + P338 If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present, if possible. Continue rinsing
P308 + P313 In case of exposure or if affected: Get medical advice / attention
Rosenstraße 22
71101 Schönaich
Germany
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4 reviews
13 November 2024 00:00
Lowering pH/KH is no problem with this product
Reducing pH/KH with acid is no problem with this product. You keep an eye on the initial values and gradually add DRAK pH/KH-Minus. As I prepare my change water in an extra container, I can bring it to the desired values without any problems.
When using it directly in the tank, I add DRAK pH/KH-Minus to 10 litres of changing water, as the fish always swim to where what is added. This means that the acid is already diluted and my fish are not harmed.
Safety goggles and gloves are used when handling acid, as recommended on the Drak website. I can only recommend this to any other user.
I will gladly buy the product again, even if you can obviously get other products a little cheaper. But then it doesn't say what's in it.
With DRAK pH/KH-Minus I know what's in it and all the data is available on the product page.
A clear purchase decision for me.
Gladly again!
3 August 2017 15:50
I use it to create a mixture...
I use it to adjust a mixture of 100 litres of osmosis water and 100 litres of tap water. With 180ml of pH/KH-Minus additive, the result is a reproducible
KH 3 and a GH 6 with our hard tap water. I've been doing this for years. I now only measure the values in the reserve tank randomly because the method always gives the same result.
4 April 2015 08:15
everything went well...
everything went well
18 February 2014 08:18
In the test phase, good ...
In the test phase, good values so far
Accessories
Suitable water tests
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