You should be able to use your existing media. Our microbial samplers have been specifically designed to accept media plates from multiple manufacturers by utilizing a spacer or adapter in order to maintain the proper air inlet slit to media plate distance for maximum validated recovery of micro-organisms. We have developed a library of petri plates and associated adapters that are supplied when the atria are ordered, as required. If your petri plate is not listed in our library, we will require a sample for evaluation.