JBL 7 Balls (Root Tabs)

JBL 7 Balls are long-term root fertiliser clay balls that slowly release iron, minerals, and essential trace elements directly at the root zone to support vigorous, sustained plant growth and prevent deficiencies like iron shortage. They act as a nutrient depot in the substrate, simplifying maintenance by reducing the frequency of liquid dosing once established.​

How they work

• Specially prepared clay balls store nutrients and release them gradually in “healthy doses” to plant roots over time.​
• Provide iron, potassium, and other trace elements to avert common deficiency symptoms and enhance root formation.​

Benefits

• Promotes strong, steady growth, which helps outcompete algae by improving overall plant health and nutrient use.​
• Long-lasting effect; many retailers describe effectiveness for many months up to around a year depending on plant load.​

Use cases

• Ideal for heavy root feeders like Echinodorus, Cryptocoryne, Vallisneria, Nymphaea, and Crinum.​
• Complements water-column fertilisers and CO2, providing a balanced approach via both roots and leaves.​

Application

• Press one or more balls into the root area once per year, adjusting quantity to plant size and density.​
• Place deep enough to prevent floating and to localise nutrients at the root zone.​