Some types of planting material.The hotel was comfortable with to be used as a substitute. Perfect light and river Mika CU tubesThat is a popular planting material, but the problem is expensive and has a life of only 1-2 times.
Some kind of ideal plant material with the clean substitute. Perlite or vermiculite a plant material is commonly used, but the problem is expensive, and is only fair use 1-2 times .