This item can be used on glass or acrylic tanks up to 0.12" - 0.24" (3 - 6mm) thickness
Perfect design that flips from scrubber to scraper.
Complete cleaning without using extra hand.
This plastic blade is suitable for acrylic tanks。
"This Cleaning Magnet is the easiest solution to effectively remove algae from your acrylic aquarium.
The Mini Size is only only siutable for acrylic tanks.(The blade can not be replaced.)"
Saim Aquarium Algae Cleaning Magnet Glass Aquarium Cleaner Mini (Orange Handle) - B00UL5OS6G