分析テストインジケータストリップ最大100ppmの過酸化物検出 (100ストリップのシリアル)

What would I use to test if 3% H2O2 is still potent?

While this product be able to measure a 7% solution of hydrogen peroxide?

How do i test 35% food grade hydrogen peroxide with your test strips. what ppm would i read on the container. what would i read if i reduced the 35%?

I bought these for my pool, after putting 5 gallon of 35% h2o2 in a 25000 gallon pool water, the strip turns black, what does that mean?