Skip to main content Skip to search Skip to main navigation

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.

  1. 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.
  2. 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

Responsible company
DRAK-Aquaristik Dr. Andreas Kremser
Rosenstraße 22
71101 Schönaich
Germany
+49 7031 776353

4 of 4 reviews

Average rating of 5 out of 5 stars


100%

0%

0%

0%

0%


Leave a review!

Share your experiences with other customers.


4 reviews

13 November 2024 00:00

Review with rating of 5 out of 5 stars

pH/KH senken, mit diesem Produkt kein Problem

Mit Säure pH/KH senken, mit diesem Produkt kein Problem. Man behält die Ausgangswerte im Blick und fügt nach und nach DRAK pH/KH-Minus hinzu. Da ich mein Wechsel Wasser in einem extra Behälter vorbereite kann ich es ohne Probleme auf die gewünschten Werte bringen. Bei einer Anwendung direkt im Becken gebe ich DRAK pH/KH-Minus in 10 Liter Wechselwasser, da die Fische immer dahin schwimmen, wo was reigegeben wird. Somit ist die Säure schon verdünnt und meine Fische werden nicht geschädigt. Schutzbrille und Handschuhe werden beim Umgang mit Säure benutzt, wie es auf der Seite von Drak empfohlen wird. Was ich auch jedem anderen Benutzer nur anraten kann. Ich werde das Produkt gerne wieder kaufen, auch wenn man andere Produkte Augenscheinlich etwas günstiger bekommt. Nur steht dann nirgends was drin ist. Bei DRAK pH/KH-Minus weis ich was drin ist und auf der Seite zum Produkt sind alle Daten Abrufbar. Für mich ein klarer Kaufentscheid. Gerne wieder!

3 August 2017 15:50

Review with rating of 5 out of 5 stars

Ich stelle damit eine Mischung...

Ich stelle damit eine Mischung von 100 l Osmosewasser und 100 l Leitungswasser ein. Bei 180ml pH/KH-Minus Zusatz ergibt sich reproduzierbar sicher eine KH 3 und eine GH 6 bei unserem harten Leitungswasser. Mache das seit Jahren. Inzwischen messe ich die Werte im Reservetank nur noch stichprobenhaft, weil die Methode immer das gleiche Ergebnis liefert.

4 April 2015 08:15

Review with rating of 5 out of 5 stars

alles gut gelaufen...

alles gut gelaufen

18 February 2014 08:18

Review with rating of 5 out of 5 stars

In der Testphase, bisher gute ...

In der Testphase, bisher gute Werte

Enquiry form

Send us an e-mail. We look forward to hearing from you.

Enquiry form
Privacy
Fields marked with asterisks (*) are required.