Hello all, I took over the care of a 200 gallon tank in September. We have had the lights on alot more than the previous owners and I have noticed two things growing and I'm not sure what they are or if they are bad or good. The first is a polyp looking thing kinda fuzzy looking, its off or dirty white in color but on the top its kindof pinkish. The second are white stringy things. Thats it white and stingy. Can anyone help? I can't seem to find anything on these.