Any advice on where I could get this chemical? Currently I'm using the Dupla KH + GH tablets to alter my water hardness but these are damn expensive to buy. Is it like Sodium Carbonite where I can just pick some up from the local supermarket? Thanks, Gordon ----- Sent using MailStart.com ( http://MailStart.Com/welcome.html ) The FREE way to access your mailbox via any web browser, anywhere!