Frequently asked questions

• What are Atami's Hydro Rokz clay pebbles for?

  They're an inert, reusable expanded clay growing medium. They're used both in hydroponic systems and as a drainage layer at the bottom of pots. They guarantee a constant oxygen supply to the roots and prevent the substrate from becoming waterlogged.

• What hydroponic systems can I use them in?

  They're an inert medium ideal for NFT, DWC or Wilma hydroponic systems. They also work very well at the base of pots to improve drainage. Since they generate moisture through evaporation, they're handy in cutting propagators.

• How do you prepare them before first use?

  First rinse them with clean water until it runs clear, without any brown colour. Then prepare osmosis or distilled water at pH 5.5 and soak them for 48 hours, adjusting the pH each time it rises. Once the pH stabilises at 5.5, the pebbles are ready to use.

• Can they be reused across several grows?

  Yes, they can be reused across multiple grows if you clean them properly. Remove root remnants thoroughly and repeat the washing and pH adjustment process before each new cycle. That way they last a long time and you get your money's worth.

• What advantage do they offer over other growing media?

  Being inert, they don't provide nutrients, so you control all the feeding yourself. They ensure a constant oxygen supply to the roots, which results in healthier crops. They're also a versatile, long-lasting medium, highly valued by growers looking for efficiency.

• Can I use them just for drainage?

  Of course. A layer at the base of the pot provides excellent drainage and prevents waterlogging in the substrate. It's a simple way to improve any soil or coco grow without changing the rest of the system.