I have types of snails 🐌 orange and black And they clean the lines and the water as if it were glass, ماشاءالله Without changing the water, supporting environmental preservation They don't need much attention or food, every two days, or if there are fish in the tank, they don't need anything at all, just put them and leave them You will find little by little the water is like glass They eat what is in the tank and the sand Less than 20 pieces Price per piece is two riyals For more than 20 pieces, the price per piece is one riyal