If you mean I detected being none you mean peroxide then the test strips only go down to less than 0.5%. I don't have star polyps in mu tank.peroxide is complicated.
How it works in dips (direct high concentration oxidative damage) and how it seems to work for some in tank-wide use against algae are probably not exactly the same mechanisms.
I wonder what level of H2O2 it takes to affect the oxidation of metals. I'm guessing lower than test kit detection.
I'm surprised @atoll detected none. I'd guess tiny amounts leak out with the bubbles from the oxydator.
Fun weirdness: My Green Star Polyps are as sensitive to peroxide as my test strips. As long as the strips could detect H2O2 in my tank, the polyps were at least partially retracted. Once the polyps looked fully extended, the strips no longer could measure any peroxide.