About Clay Pebbles:Clay Pebbles, Clay Balls or Lightweight Expanded Clay Aggregate - The only thing you need for a simple semi hydro set-up (except water of course). The small balls of clay wick water upwards, meaning a little pool of water at the bottom of a pot made for semi hydro can hydrate all the way to the top! The balls also provide massive chambers of oxygen for roots to grow super strong which you will see the rewards of in your foliage. Conversely, you can add clay balls into soil for extra water retention in your mixture. If you're unsure, see the labelled images to double check the shape you would like before you buy. Irregular Clay Pebbles: 4-10mmRound Clay Pebbles: 8-15mm Be sure to read our Ultimate Component Guide to learn more about Leca More On Clay Pebbles:Clay Pebbles - The Soil.Ninja Complete Guide Useful Tools:Soil.Ninja Houseplant IndexSoil.Ninja Soil Calculator
