I got my betta named pirate about two weeks ago. He is in a 5 gallon tank with a few decorations and a moss ball. He has a heater that has the tank at 79 Fahrenheit and a tetra whisper 10 internal filter. He eats new life spectrum small fish formula, he also freeze dried blood worms, and frozen brine shrimp. How can I rid him of ick without killing my moss ball and my bio filter? Or staining my tank green?