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Aqua Rebell Makro Spezial K

Aqua Rebell Makro Spezial K

  • Highly concentrated potassium fertiliser
  • Ideal in combination with soil substrates
  • Great choice for aquascaping
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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 Spezial K adds the important macronutrient of potassium to 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 already contains a lot of potassium from the start, this fertilizer does not have to be added. It has been designed to prevent the accumulation of large concentrations of macronutrients. If high levels of potassium occur, please reduce the dosage. Makro Spezial K might slightly raise the carbonate hardness in your tank.

The basic supply of macronutrients in a tank with soil-based substrate is provided by our waterplant fertilizers Makro Spezial Licht (nitrate, phosphate and potassium), Makro Spezial K (potassium) and Special N (nitrate). Our waterplant fertilizer Aqua Rebell Makro Spezial K plays a central role in supplying an aquarium with a soil-based substrate with nutrients. The soil substrate contains considerable quantities of nitrogen and phosphorus. Potassium should be supplemented by Makro Spezial K, thus doing away with the nutrient imbalance and giving the waterplants the optimum nutrient supply they need for healthy growth.

When used in high doses, Makro Spezial K can raise the carbonate hardness. However, this is always a sign that the waterplants do not use the potassium you add. If there are no further substances in your tank to raise the carbonate hardness you can safely assume that it is caused by an potassium accumulation, and lower the amount of fertilizer you add.


  • 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 1-2 ml per day
Little light (<0.5 Watt per litre) + CO2 1 ml per day
No CO2 supply 1-4 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.

1 ml Makro Spezial K 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.

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Customer reviews

This item has been rated 4.9 out of 5 stars
15 Reviews
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5 Stars(13)
4 Stars(2)
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1 Star(0)
Athanasios k.
15th October 2013
Aqua Rebell - Makro Spezial - K - 500 ml
Aqua Rebell - Makro Spezial - K - 500 ml

A good fertilizer with competative price. Very handy with the dose pump.

Athanasios k.
27th August 2013
Aqua Rebell - Makro Spezial - K - 500 ml
Aqua Rebell - Makro Spezial - K - 500 ml

Good price and effective in supplying potassium.

Steffen W.
23rd December 2013
Aqua Rebell - Makro Spezial - K - 500 ml
Aqua Rebell - Makro Spezial - K - 500 ml

die schnellste und einfachste Lösung Blauallgen los zu werden..... :-)

einfach ein paar Tage etwas überdosieren und gut. zumindest in meinem Becken.

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