Interpet Aquarium Anti Snail No.11 100ml For use in COLDWATER and TROPICAL freshwater systems Does not colour the aqaurium water Safe for filters and all species of fish and plants if used according to instructions Single dose water treatment One bottle treats up to 500 litres (110 gals) Do not use with invertebrates Do not use with other copper treatments Not for use in soft water aquariums Contains Copper Sulphate Price: £4.29 Quantity: