🐟【6 IN 1 Multifunctional】bedee fish tank gravel cleaner can ①wash sand, ②suck manure, ③brush tank, ④shovel sand, ⑤filter water, ⑥change water. High quality plastic material, will not harm the fish, make you to clean fish tank more time-saving and efficient than manual siphon. External independent switch, and switch is not