high nitrate tap water

Here are the current tanks that we will be dealing with throughout this thread: 29 Gallon Freshwater Tank - Fully Planted - Hard Water needs to be Soft Water 12 Neon Tetras - 1 Cardinal Tetra (4 Neons and 1 Cardinal were added this yesterday) 4 Bronze Cory 1 Male Lyretail Sailfin Molly 1...