"Another quick note to thank Helen for wonderful service and a wonderful product... I changed to Nature Spa for our 7,000 litre swim spa last year after trying just about every other product out there... My husband suffers greatly from psoriasis all over his body, and your products do not affect his skin in any way. If anything, your products help him as now he spends a lot of time outside in the sun and fresh air. I was spending a fortune on chemicals before and felt like I needed a degree to get the balances right, along with aggravating my husbands skin and everyone elses. Nature Spa products are easy on the wallet and I get results I have never been able to achieve before. I love to walk outside and see my spa glisten in the sun. Thank you once again for the cost effective, quick and easy products that actually deliver wonderful results..."