Hydrostones are the perfect medium for air plants and many more. As air plants don’t need a lot of water, they do need water to survive. Stones will hold water and keep the air moist in between waterings.

Hydro stones help create optimal growing conditions in many applications because they hold moisture to maintain the perfect air and water balance. It is also ideal for terrariums and hydroponic growing. Mix with dirt for natural aeration, or layer at the base of plants to prevent root rot.

Use stones in plant centerpieces for a natural look and performance.



Made from expanded clay, Canna Aqua Pebbles are porous, lightweight, and make for a fantastic all-round hydroponic medium for systems such as the Alien and IWS. They are also great for mixing with your soil and coco to create a far more aerated medium that drains more freely. This not only helps reduce the chance of overwatering but also gives your plant the possibility of receiving more nutrition due to the increased amount of irrigation you can now provide. They are chemically inert as well as pH stable, meaning they will not interfere with any other mediums or the nutrients you are feeding.

The size of our clay pebbles in the bag varies between 8 and 16 mm, and they are all in a uniform, circular shape with a smooth surface. This is especially good when they are used as a standalone medium, as there is no chance of damage to the root zone, which can occur with other brands that have a more ‘jagged’ shape.

Canna Aqua Pebbles are pre-washed, but we always highly recommend washing them before use to ensure that any extra dust is removed. This is especially important where pebbles are being used as the only choice of medium in a hydroponic system, as you do not want to risk any pipe blockages! If using pebbles as a standalone medium, then always use a ‘hydroponic-specific’ nutrient.

Pebbles can also be used at the top and bottom of your pots! Add a layer of pebbles to the top of each of your pots as a'mulch' layer to help keep your growing medium moist. Alternatively, adding a layer at the bottom of your pot can help aid drainage and is particularly important when you are bottom-feeding your plants or using an AutoPot System, as it will practically eliminate the risk of overwatering.

Clay pebbles can also be reused! Once you have harvested your crop and removed the bulk of it, soak it with a heavy dose of an enzyme product such as Cannazym to break down the remaining roots and dead plant matter. Then, before re-planting, wash them out with a solution of liquid oxygen to ensure they are sterile and clean.