So, about a week and a half ago, my filter started to die. It was the TopFin 20 that came with my aquarium starter kit. It had been acting strange for a while, so I had already ordered a new Fluval c4 for my 20 gallon tank. Overkill yes, but for the sale price , I couldn't resist. Anyway, two days after the new filter arrived, my old filter died completely. I did not have the option to run the two together to cycle the new filter. Also, the old filter media would not fit in the new compartmentalized C4. So, I stuck the old filter media behind the intake tube of the new filter in the tank and started it up. My water parameters have not changed at all. Ammonia is 0, Nitrite is 0, and Nitrate stays between 10-20. I have a pretty heavily planted tank, and i do a 25% WC weekly. However, my water has become very hazy after the filter change. It is milky white. Any ideas if this is just a bacterial bloom from changing the filter? It has been hazy for a little over a week now. Water parameters still normal.