On Saturday i picked up a couple of fancy Guppies from Hollywood Mt Roskill, unfortunately my quarantine tank has some platties in it that my g/f unexpectedly bought for me which i didn't want to put in with my swords and guppies, so the new guppies spent 45 mins getting accustomed to the new tank and in they went.
Following morning one had died so i took it back and got a replacement on Sunday.
Tuesday night i noticed a few seemed umm heavy and were sinking to the bottom having trouble staying up higher in the tank, Wednesday night i took out 4 dead guppies and saw about 4 more that didn't look well, started to dose with melafix.
Got home tonight to find 27 dead guppies oops make that 31 now, 37 now, 10 in just under 2 hrs & about another 10 looking sad.
30 odd swords, 3 x GBA & 2 x clown loaches all looking good and healthy.
They are in a 4 ft 190 ltr that has been setup for nearly a year running an Eheim 2213 filter & air curtain.
Ammonia, nitrite are 0, nitrate is 20 which it has been since just after the tank was setup & ph is 6.8, no salt in the tank, weekly 20% water changes.
Does anyone have any idea of diseases etc that affect only guppies?