Testing Potassium for Perfect Plant Growth

Potassium is one of the macroelements which is quickly and effectively absorbed within a few hours and temporarily stored by plants in freshwater. In growing plants the demand for potassium is higher than other elements. As a result, potassium concentrations can drop to a minimum range, causing plant growth to stagnate, even if the aquarium water is fertilised regularly (e.g. weekly). Potassium levels in mains water are usually too low compared to those in natural biotopes, particularly in relation to calcium and magnesium concentrations.

How often should you test?

Firstly we recommend you measure the potassium content of your aquarium water daily. This way the plants’ needs can be determined and the fertiliser can be dosed appropriately. After that you can continue the routine measurements less frequently.

What is the ideal content?

For good plant growth the value needs to be approximately 5 - 10 mg/l, for aquariums with high power lighting (from about 1 W/l illuminance) between 10 and 30 mg/l. Higher potassium levels in the aquarium will lead to the growth of green thread algae.

Action, when too much or not enough

Potassium content too low (< 5 mg/l): Fertilisation with JBL PROFLORA Ferropol , JBL PROSCAPE Fe +MICROELEMENTS and especially daily fertilisation with JBL PROSCAPE K MACROELEMENTS .

Potassium content too high (> 20 mg/l): Repeat measurement after 24 hours. If value is still too high, carry out an adequate water change.

How is the test carried out?

This short video shows you how easy it is to carry out the JBL K Potasyum Testi .

© 07.09.2017
Matthias Wiesensee
Matthias Wiesensee
M.Sc. Wirtschaftsinformatik

Social Media, Online Marketing, Homepage, Kundenservice, Problemlöser, Fotografie, Blogger, Tauchen, Inlineskating, Aquaristik, Gartenteich, Reisen, Technik, Elektronische Musik

Hakkımda: Seit Teenagerzeiten mit Aquarien in Kontakt. Klassische Fischaquarien, reine Pflanzenaquarien bis hin zum Aquascape. Aber auch ein Gartenteich und Riffaquarien begleiten mich privat im Hobby. Als Wirtschaftsinformatiker, M.Sc. bin ich als Online Marketing Manager bei JBL für die Bereiche Social Media, Webentwicklung und der Kommunikation mit dem Anwender der JBL Produkte zuständig und kenne die JBL Produkte im Detail.