Thanks for your help , I have two smaller discus, 3 scissor tails, 3 cardinal tetras, 2 platties, 2 dwarf gourami, 3 danios, 1 baby brittlenose 2 rosy barbs and 2 glowlight tetras and 2 penguin tetras i am wondering if my ovrgrown plants are causing stress?? I ma quite upset about it! especially since it lost all colour so quickly