As a first time customer I received a promo code with 10% discount. I found this BiocideSystems website and decided to give it a try. When I made my order I applied the code but it did nothing and they charged me the full price. I contacted BiocideSystems customer service and asked them to cancel my order and refund my money. They said that I need to wait for my order to arrive, then I have to ship it back and only after that they will refund me. When I received my order I contacted them again and asked for a return address and their rep said that they don’t do refunds!! But their site said that they 100% guarantee money back!! What a scam!