great water parameters yet every thing dies

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sdavis76

Gambusia
MFK Member
Mar 26, 2009
120
0
16
texas
ok to start off i have 125 gal 2 year old tank with pfs and a fx5 for filtration. my lifestock currently is two 5 year old florida gar, and two blue crawfish. my water parameters have all been in check , the water is clear and does not smell. but my problem is it seems like everything i put in there dies like the get sick. yesterday i dumped 25 feeders and within 1 hour all were dead but two. the gar and crawfish act like nothing is wrong. really never looked better. i had three adult plecs that went belly up over a two or three day period this summer. is there something im not testing for ? why does everything seem to die in such a short time in this tank but not bother the gar? im thinking of moving my gar out to an outside pond and putting some catfish in it but i dont want to send them to an early death. any ideas?
 
You don't say what your parameters are. What sometimes happens is, fish gradually accustom themselves to certain water, that would kill something new.
An example- due to lack of water changes, water grows more and more acidic, over a period of months, to maybe a pH of 5.
The resident fish/crustaceans have had time to get used to it, drop in anything else, sudden death. Other parameters could do this too, other than pH...hardness, conductivity, high nitrates,even stray electrical charge.
 
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