How to regenerate zeolite?

Natural zeolites are mineral rocks with a chemical composition close to that of clays.

They have the capacity to absorb ammonium ions (NH4+) in exchange for sodium ions (Na+). Among the many types of zeolite, clinoptilolite is the most effective.

Under optimal conditions (soft water, low hardness, neutral pH) and for a small particle size (4-8 mm maximum), 1 g of clinoptilolite can theoretically absorb up to 9 mg of ammonium (in practice, a more realistic value of 2 mg is retained).

The recommended quantity of zeolite is 1 kg per cubic meter of pond water (to be placed in a net, in filtration or in an area with strong mixing).

You can place an order for zeolite directly from our store.

Regeneration protocol

The particularity of zeolite is its ability to release ammonium absorbed in the presence of sodium ions (Na+) and at very high pH (basic). To regenerate zeolite loaded with ammonium, we recommend the following protocol:

In a clean tank containing 10 liters of water, add 300 g of sodium chloride salt (NaCl), 4 g of pure caustic soda (NaOH, objective at least pH 12), mix well until completely dissolved, then place 1 kg of zeolite to regenerate for at least 24 hours.*

• Use gloves to handle the caustic soda.

This regeneration solution can be used several times.

The zeolite can be regenerated in theory up to 500 times (in practice, renew it after around twenty times).

It is recommended to pre-wash the zeolite before regeneration to eliminate any organic matter on its surface.

Rinse the solution well. zeolite with fresh water after each regeneration.

Warnings

Remember to remove the zeolite from your pond if you decide to artificially increase the salinity of your water.