Grodan Growcubes are about the size of a thumbnail. They stack on top of each other and air pockets are created.

They are a light weight alternative to your regular potting mix.They can be used in ebb & flow, top watering, or just watering with a watering can.

Growcubes do not need to be changed as they will last the life of your plant.

If you are new to hydroponics, then this is the product you should choose. Complete with package instructions. Growcubes are easy to use and reasonably priced.