Hi user and welcome to AQ,
I would encourage you to read up the beginner's corner sticky and learn more about the beautiful world of aquarium of living plants and their coexistents.
Lapis sand is a good choice and you will need base fertisler(JBL aquabasic).
You can buy all this at Natural Aquarium at blk 1 Thomson Road. As for how much and quantity the shopowner can help you. Enjoys!
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