Hi Lynda and welcome to the fishroom. By the way, joining this board does not make you a member of the FNZAS, it just gives you access to us . To belong to the FNZAS you must join an affiliated club. Unfortunately, the Levin club went in to recess a few years ago but I assure you there are fellow fishkeepers there! Nothing to stop you joining any of the other affiliated clubs though. Click on the FNZAS logo at the top of the page then look for the CLUBS link.
As misnomer said, a bit more information about your tank would help. How many fish are in it? What sort? What sort of plants do you have? What is the tank pH? What is the tap water pH too for that matter? What happens to the plants when you add them to the tank?
The answers to these will help us to help you. You can also join us in the chat room most evenings around 9pm.