The stainless blade seems to remove a full 65mm width strip of algae from the glass with a single pass, whereas other blades seem to miss patches & start to deteriorate after a few uses.
These glasses typically use a colour-correcting lens technology that filters out specific wavelengths of light, allowing for a clearer & more vibrant view of the corals' natural colours.
This powdered material mixes easily with water to produce an acid solution that will remove thick hardened on calcium deposits which solutions like vinegar would not touch.