The whole deal on chemicals coming out of PVC is total BS like most of the fads like the ozone hole or global warming. The idea is to find something that the 1st world (us) uses and the 3rd world doesn't. Next thing to do is to make up an issue that is nearly impossible to disprove and put it out there to tear down modern technology. You'll see this theme over & over. Each and every one is eventually proven false, but the political damage can never be undone.
I started by raising apple snails, then went on to giant prawns. Both are very sensitive to any sort of chemical contamination. They grew like there was no tomorrow. Remember these pools are designed for use in infant humans. They are the most susceptible to these sorts of estrogen simulants. Pool companies would come to en end, not to mention baby bottles, etc. Lots of accusations, but no science.
In this last picture you'll see the writing on the bottom of the easyset pool.
Here is what the prawns looked like when I got then at 1/4"
The thing at the top is a titanium heater for scale.
Beef and fat in general along with refined sugars, especially high fructose corn syrup is what is doing us in.