I use these types of pools all the time. You can order liners from various above ground pool suppliers that are free of fungicides. Most of the department store pools I've seen offer pools with 100% virgin vinyl liners(no fungicides). I would highly recommend placing a second liner underneath, preferably a pond liner of 45 mil. Those pool liners are 20 or 10 mil and will puncture easier than a 45 mil pond liner. I've also noticed that the pool liners become brittle and start to tear after a year and a half to two years. This may be because I am using saltwater and/or that they are mostly outside in the sun. Just be aware that you may need to replace a pool liner after a year or two.