Hi, over the last couple of days a thin layer of pink algae like stuff has grown on the glass of mybtank and on the fiilter. Was wondering if anyone knew what it is and what I can do? Im worried its cyanobacteria. I moved my tank a week ago so dont know if that makes a difference. Also i just purchased a new fish so could I have introduced something to my tank from the pet shop, their tanks seemed spotless?