Many growers are now using CHC (Coconut Husk Cips) because they last much longer than traditional wood chips and they retain moisture longer. So the key is not to water as frequently as one otherwise would. But for this reason (water retention) many people don't like them. Like so much with growing orchids, you have to find yourcomfort zone and use what feels good to you. Many people swear by sphagum moss, I have a problem with it.....I's sure you get the point.....good luck growing.....