Si_2202
New Member
HI all,
I've just done a 50% water change in my 500l tank and all my Rummynose Tetras ended up laying on the substrate. The rainbows and SAE seem to be unaffected. Some of the Tetras are up and swimming around again whilst others are still on the substrate not moving, seemingly dead.
I've never experienced anything like this before so any help would be appreciated!
Edit: The tank has been running pressurised CO2 for approximately 2 weeks now. It's filtered by a Eheim 2217 and a Fluval FX6. The water I put in was about the same temperature as the tank and I dechlorinated the whole tank before putting the filters and heaters back on.
I've just done a 50% water change in my 500l tank and all my Rummynose Tetras ended up laying on the substrate. The rainbows and SAE seem to be unaffected. Some of the Tetras are up and swimming around again whilst others are still on the substrate not moving, seemingly dead.
I've never experienced anything like this before so any help would be appreciated!
Edit: The tank has been running pressurised CO2 for approximately 2 weeks now. It's filtered by a Eheim 2217 and a Fluval FX6. The water I put in was about the same temperature as the tank and I dechlorinated the whole tank before putting the filters and heaters back on.