Suitable Size & High-Quality Material The size variety—ranging from 4mm to 16mm—gives you great flexibility depending on what you're growing. From orchids to Dutch bucket setup, these expanded clay pebbles provide just the right amount of aeration and drainage. These clay pebbles are natural, organic, porous and lightweight. And started on their reusability—these things will last forever if you rinse them off and treat them right. A Variety of Purposes In Your Home Reptile Tank Drainage Layer Hydro balls can decompose food residue, waste in the aquarium, which helps to improve and purify the tank environment for optimal filtration. Perfect for Hydroponic Setups These expanded clay pebbles provide just the right amount of aeration and drainage, are a must-have for perfect moisture control and happy roots. Great for Cuttings Propagation Plants grow in lecca require less frequent watering. The pellets hold enough moisture to reduce the need for constant monitoring and maintenance. Good for Growing Houseplants At the bottom of the planter, these clay pellets add nice drainage; at the top of the soil, they keep the moisture in the dirt. If you’re new to semi-hydroponics, here are a few things to keep in mind: Before using, rinse the clay pebbles until the water runs clear, then soak it for 24-48 hours.Expanded clay pebbles can help your plants thrive!!! There can be a trial and error period before you’re completely comfortable with clay balls. So, if your plants fail, many times it is due to this and not the clay balls.There are a few ways to use planters with hydroponic clay pebbles : a planter with no drainage or a nursery pot or net pot inside of planter with no drainage.When transitioning your plant from soil to Leca be VERY CAREFUL! Wash the roots of your plant and make sure all of the dirt is off of it. If you do not do that, you can develop root rot. You’ll also need to frequently flush the dying roots when first transplanting to ensure they’re not just sitting there.Clay Pebbles are not soil which means it does not have a nutrients. This means you have to be on top of fertilizer because water alone won’t cut it. Feed your plants (aka the water reservoir) with a hydroponic nutrient solution or liquid fertilizer.