Leslies also has another kit:
Chlorine FAS-DPD Service Test Kit that includes the high-range FAS-DPD chlorine test. It's basically the Taylor 2006 but the one Taylor makes that's Leslie's branded.

Do not, NOT, NOT use "green algaecide". Your wife may think it's a magic bullet but there is no such thing in pool care. You will end up with more problems than you have now.

Follow Janet's advice instead. There is no better algaecide than chlorine. Since you don't have a vinyl or fiberglass pool, you can safely run your chlorine up much, much higher than Ben's shock level of 25ppm. This may buy you time if you cannot test 3x a day and add chlorine as you need it. Your pool will tolerate levels as high as 60ppm and may, as I said, buy you time before it drops below 25ppm.

But you won't kill the algae unless you hit that 25ppm mark.

You need one more ingredient, and it's vital: POP--for Pool Owner Patience. Full-blown algae blooms require a siege, not a blitzkrieg. It may take up to 2 weeks to clear your pool, but if you follow Janet's advice you should see progress in a few days. Progress, not completion.