Introducing stunning coloured pebbles that can be the difference is setting out your aqaurium from the restr coming in 2kg bags that have a range of small to medium sized pebbles you can decorate your aquarium exactly to your needsr please rinse gently with cold water before use to remove any dust or particles no need for chemical cleaning or use of abrasive sponges to cleanr aquarium enviroment should always be stabilised before introducing fish