Welcome magic1234 to the PB forum.

Here is a link to Aquaplant. Each plant is different. CUSO4 (copper ) will work on some but not others. Go to the link and look up each plant then the management options.. Note that some copper products have potential water quality issues. There are a bunch of threads on Copper products here to read first before you try one.

http://aquaplant.tamu.edu/