Hey everyone, So for a week or so my tank has been cloudy and I thought maybe the filter pad wasn't good enough so I replaced it with three types of filter media that I squeezed in the filter. The water had been cycled for like months since it's water from the fish pond in the backyard (Ammonia: 0, Nitrites: 0, Nitrates: <10), so I thought changing the filter stuff wouldn't be that bad. A few days after changing the filter stuff the water is getting cloudier and cloudier, but the parameters remain unchanged. If it's a bacterial bloom, is it dangerous for my guppies and cory cats? Also, should I be doing frequent water changes?