02-01-2006, 08:36 AM
Join Date: Jun 2005
iTrader Positive Rating: 100%
Perhaps it was the fluctuation of the pH. Remember that by the time most Tetras hit your tank, they are pretty stressed from transportation to the LFS, stressful conditions at the LFS (cramped quarters), stress from being netted, stress from transportation from the LFS to the new owner's tank. The fish Pete sells may have very well of been wild caught on top of all of that, so these guys have been through a lot stressful conditions along the way and major water change may have been the straw that broke the camel's back.
With hindsight being 20/20, it probably would have been better to drip acclimate the Tetras with the water they came in into a quarantine tank and then leave them be for a couple of weeks. I know that Pete also sells RO & tap water options for some fish, like the wild caught Hatchetfish. The Tetras may have come from an RO water tank. I know that I've killed whole batches of home grown Tetra fry by trying to acclimate them too quickly to peat filtered tap water and they were born and raised in RO water. I'm still trying to master RO to tap water acclimation for Tetras. While rapid pH fluctuation can stress most fish, I've been told that with Tetras it's the KH fluctuation can kill them. In nature, Tetras come from very pure water with a KH of 4 or less.
So stress and major fluctuation in water parameters may be the culprits here...