Amazon sells one of those super magnet glass tank algae cleaners , i.e.
Magnetic Aquarium Fish Tank Cleaner, KEDSUM Fish Tank Glass Cleaner, Algae Scraper Floating Clean Brush with Handle Design
One reviewer says the magnet is so strong it could break the glass if you are not careful and it draws the inside the tank half too suddenly against the outer half. Has anybody here ever hear tell of a glass tank full of water breaking by a magnet attracting something?
Magnetic Aquarium Fish Tank Cleaner, KEDSUM Fish Tank Glass Cleaner, Algae Scraper Floating Clean Brush with Handle Design
One reviewer says the magnet is so strong it could break the glass if you are not careful and it draws the inside the tank half too suddenly against the outer half. Has anybody here ever hear tell of a glass tank full of water breaking by a magnet attracting something?