Your cart is empty.

Aqua Rebell Makro Basic Kalium

Aqua Rebell Makro Basic Kalium

  • Potassium fertiliser
  • Suitable for batch fertilisation
  • Perfect for aquascaping
In stock
Free shipping on orders over € 50.- within Germany Change region
Express delivery possible
1-3 business days - order within the next 55 minutes and we’ll deliver tomorrow at the earliest
I want to order to 
€ 11.98 / l
incl. 16% VAT
plus € 4.90 Shipping
Item is now in your shopping cart!
View my cart

We’re here for you!

Limited telephone support at the moment.

Due to the current Corona situation, we are unfortunately not able to offer full telephone support, as many employees had to move to their home office.

You can still reach us via e-mail and we will be happy to help you!

We kindly ask for your understanding in view of the current situation. Take care of yourself and stay healthy!


Item question

We’re here for you!

Please enter your question and e-mail and we’ll contact you as soon as possible. It usually takes us up to 24 hours during business days to respond.

Thank you for your question!

Thank you, we’ll get in touch!

Close window

You already sent us a question.

Please wait a few minutes


In a strongly lit well-planted tank or in aquariums with few fish a lack of macronutrients may occur, which in turn can lead to poor plant growth. Makro Basic Kalium brings the important macronutrients of nitrogen and potassium into your tank. Your plants can draw on plentiful resources again and will thank you with lush growth.

Weekly water changes of 25% to 50% are recommendable. The dosage can be raised or lowered depending on your requirements. If your tank water shows high readings of nitrate from the start, this fertilizer is not suitable for your aquarium, though. It has been designed to prevent the accumulation of large concentrations of macronutrients. If high levels of nitrate occur, please reduce the dosage.

The basic supply of macronutrients in a tank is provided either by our NPK fertilizer, our Estimative Index fertilizer or by our single-nutrient fertilizers (Makro Basic Nitrat, Phosphat and Kalium). Our aquatic plant fertilizer Aqua Rebell Makro Basic Kalium is a very important component in our single-nutrient fertilizing system. It adds the essential nutrient potassium to the aquarium and is also optimally suited for batch fertilization (larger fertilizer quantity given just once), for example after a waterchange. Potassium is one of the few nutrients that is only roughly added my fish food. It is also not or only little available in tap water and should therefore be extra fertilized.


  • Comes in packages with a volume of 500 ml, 1,000 ml and 5 litres


Dosage per 50 litres
Lots of light (>0.5 Watt per litre) + CO2 2 ml per day
Little light (<0.5 Watt per litre) + CO2 1 ml per day
No CO2 supply 2-4 ml per week

This dosage suggestion is just a guideline. The dosage may have to be raised or lowered depending on the conditions in your tank in order to give you good results.

2 ml Makro Basic Kalium per 50 litres of tank water adds the following nutrients:
K 1.00 mg/l

Aqua Rebell

Aqua Rebell

Aqua Rebell is our own aquatic plant fertiliser label. A great number of planted tank enthusiasts in general and aquascapers in particular use our products to supply their aquarium plants with nutrients.

When developing fertilisers and other aquascaping-related products, we work hand in hand with a base of aquarium enthusiasts and aquascapers, and we try to realise as many of their desires and ideas as possible. Quite often, ideas and wishes uttered in our aquatic plant lovers' and aquascapers' community www.flowgrow.de are the basis, on which we develop new products. These are then thoroughly tested by experienced aquarium keepers and aquascapers. Behind our product range, there are a lot of innovative ideas and long-term experience, and they are tested in real life. For us it is important that aquarium keepers and aquascapers are successful with our products and that they are thus enabled to make the utmost of their tanks and aquascapes.

General information

Item no.
EAN 4250585205260
Weight 5,44 kg
Shipping weight 5,46 kg

Customer reviews

This item has been rated 5 out of 5 stars
2 Reviews
Please sign in if you want to write a review. Sign in
5 Stars(19)
4 Stars(1)
3 Stars(0)
2 Stars(0)
1 Star(0)
25th October 2009
Aqua Rebell - Makro Basic - Kalium - 500 ml
Aqua Rebell - Makro Basic - Kalium - 500 ml

Perfect for PPS - Simple. If one has only potassium needs then this product satisfies it.

Athanasios k.
Very useful
14th September 2014
Aqua Rebell - Makro Basic - Kalium - 1.000 ml
Aqua Rebell - Makro Basic - Kalium - 1.000 ml

Good ratio between quality and cost. Not too concentrated, making dosing easier and more flexible according to my needs. (read more)

Timo S.
Der Dauerbrenner
2nd August 2014
Aqua Rebell - Makro Basic-  Kalium - 5.000 ml
Aqua Rebell - Makro Basic- Kalium - 5.000 ml

Kalium ist wohl die am meist verwendete Düngemenge im Basic Segment, daher die große Packung. Wie üblich sehr gute Qualität.

View all reviews