hmm, if you did use dechlorinator then I wonder if it wasnt the chlorine, but possible something bacterial or sewage related if there was flooding anywhere near the water source.
I dont know if it would help the rest, but you could try a water change with some bottled water, like 5 gallon jugs, lots of dechlorinator and perhaps some antibiotics. it sounds a little desperate, but maybe it would prevent you from loosing any more.
I dont know if it would help the rest, but you could try a water change with some bottled water, like 5 gallon jugs, lots of dechlorinator and perhaps some antibiotics. it sounds a little desperate, but maybe it would prevent you from loosing any more.