What's going on everyone? New guy to this forum. I've recently had an issue with my main community tank.
Tank stats:
40 Gallon
Planted with one Ruffle and one Green Myrio
Sand over gravel substrate
Established for 3 years
My tank is established and contained 2 angels, 1 flying fox, 2 discus, 1 blue jack dempsey, 1 rose tetra, and 1 GBR. So about 3 months ago, I got a new canister filter and set it up to run with most of the original filters media. I transferred the bio blocks over as well as the carbon and foam to the new canister. I woke up Thursday to cloudy water and all but the 2 angels and 1 jack dempsey were dead! The water stats are as follows:
Ammonia: 0ppm
Nitrate: 20-40ppm (Color is close to both in test vial)
Nitrite: 5ppm
Ph: 7.6
Water temp: 82
My question is what could have happened? I do weekly 10% water changes while vacuuming the substrate, and feed once per day either blood worms or flake food. I've treated the tank with a 50% immediate water change and 25% water changes daily since then. I've also added API Quick start as well as Nite-Out II in an attempt to save what fish I have left. The fish showed zero signs of stress before the water conditions changed. Any help is appreciated.
Tank stats:
40 Gallon
Planted with one Ruffle and one Green Myrio
Sand over gravel substrate
Established for 3 years
My tank is established and contained 2 angels, 1 flying fox, 2 discus, 1 blue jack dempsey, 1 rose tetra, and 1 GBR. So about 3 months ago, I got a new canister filter and set it up to run with most of the original filters media. I transferred the bio blocks over as well as the carbon and foam to the new canister. I woke up Thursday to cloudy water and all but the 2 angels and 1 jack dempsey were dead! The water stats are as follows:
Ammonia: 0ppm
Nitrate: 20-40ppm (Color is close to both in test vial)
Nitrite: 5ppm
Ph: 7.6
Water temp: 82
My question is what could have happened? I do weekly 10% water changes while vacuuming the substrate, and feed once per day either blood worms or flake food. I've treated the tank with a 50% immediate water change and 25% water changes daily since then. I've also added API Quick start as well as Nite-Out II in an attempt to save what fish I have left. The fish showed zero signs of stress before the water conditions changed. Any help is appreciated.