Tetra1990
Aquarium Advice Addict
on Sunday, I did my normal larger PWC, about 50 percent. I do this 2-3times a month. My normal. Weekly pwc is 20%. I also changed my filter media. It hasn't been changed since the tank was started back in late January of this year. When I woke up and turned on my tank light, everyone was belly up did the tank go into a mini cycle? I added prime to the new water and matched my temp. No, I didn't test the water last night. I was planning on doing is this morning. Please help me!! What did I do wrong?