7fishers
Aquarium Advice Newbie
I did a 30% water change yesterday morning. Added everything I usually do. I even, just to be safe, had my water tested at a fish store. This morning about 75% of my fish are breathing fast and labored. I added an aerator and took out about 1/8 of the water so there would be a lot of movement of the water to provide oxygen. I waited about an hour and then added water back, with Prime, but kept the water right at the bottom of the filter to continue movement. My gouramis are still breathing hard as is my shark. My small schooling fish look much better. My tank is 55 gallons. I'm worried I'm losing my gourami. Any advice????