Yup. It’s totally for real. Just like their other tests and advice.
Oh, Wait. Did you mean to ask if this would be different from their *other* tests and bad advice ?
In that case no. It’s junk. They rent you the machine for $50 and credit you $50 in chems but make you pay for the cartridges. Which until proven otherwise will only be as accurate as the ones in the store. But they’ll have ZERO problems selling you overpriced and watered down chems with your $50 credit. And charge you $200 more for the balance I’m sure.
Which will make you take a pool chemistry roller coaster that ends in derailment. Anywho stay away. Stay far far away.