So in my aqua clear 70 I had a stock bag of carbon, I didn't realize the bag they are in deteriorate well I did my pwc yesterday and saw black little rocks in my tank, I could not siphon out, I went down again today and now my tank is full with them, will this hurt my tank I plan on finding a way to get them out but right now I don't know how, will my fish be okay with the little pieces of carbon inside the tank?