K Boost 125ml – liquid potassium

This 125 ml bottle of Aquaforest K Boost is a liquid potassium fertilizer for planted aquariums. It suits keepers who see yellowing leaf edges or tips on their plants and want to correct a potassium shortfall with a measurable, dosed product.

Why it matters

• Potassium acts as a building block in plant tissue and as an enzyme activator in many biochemical reactions.
• It regulates osmotic balance and supports the transport of compounds within the plant.
• Deficiency first shows as yellowing of leaf margins and tips, and at a later stage as necrosis.
• The product is described as quickly assimilated by plants, so visible results can appear after a short period of use.

Specifications

• Product: Aquaforest AF K Boost
• Volume: 125 ml
• Weight: 0.14 kg
• Form: liquid potassium fertilizer
• Dosing: 10 ml per 100 l of water raises potassium by 0.4 mg/l
• Target potassium concentration: 10–20 mg/l

What it works with

The product is designed for planted aquariums and is dosed by water volume, so the amount is calculated from the tank size. The manufacturer recommends using it alongside AF Micro, AF PO4 Boost and AF N Boost. Substrate additives such as zeolite and/or activated carbon may reduce its effectiveness.