Help Needed - Dead Fish!

[Chris Wright]

Can anyone help? I have just lost 2 Endlers Guppies and 2 Pygmy Corys. Just dead at the bottom. The 6 Galaxy Rasboras are still fine (although still not eating properly). I have no ammonia and no nitrites in the water. The Edge tank is in the conservatory and the cold weather has brought the temp down so that the 25w heater couldn't cope and the temp in the tank maxed at 72 and dropped to about 70 degrees each night. I bought a new 50w heater and because it was larger, had to disrupt the tank and it got a bit stirred up, with the substrata being exposed. I topped up the water as a 15% water change and the filter cleared it in a few hours. But the following day the 4 smallest fish were dead with no marks or symptoms.
Can anyone advise what I did wrong? Did they choke or was it the stress? And how do I get the Galaxies to eat properly? I've tried feeding micro pellets and JBL Nova micromix and mostly they ignore the pellets as they drop.

 

[ghhghh]

HI chris
I know endlers are attractive but from my experience with guppies
They r weak due to excessive inbreeding. Apart from that I need more info
about ur tank;

Is he water well oxygenated?
Whats ur ph?

As for the galaxies just keep in mind that fish can survive
quite a while without food. Are your galaxies stressed at all?

And m ost important question;

Is ur tank cycled?

 

[betta989]

it may have been stress or inproper breading and some fish can be very fradgle and you said you stured the tank? that may have stressed them and have you done reasrch i havent on those fish but was the tempo between the requirements?

 

[Chris Wright]

Tank is Fluval Edge, well cycled, no ammonia or nitrite present. PH is 7.8. Galaxies swimming around unstressed. Filter is running except when actually feeding, tank is well planted. Temp is now 74F. Lights are on automatically for 9 hrs each day. Occasionally see a Galaxy go for a dropping particle of food, but generally most of the food drops to the bottom uneaten. I've been careful not to put in more than a very tiny few grains.

The 2 Endlers and 2 pygmy corys were swimming around OK for the first few days. maybe it was just shock of the tenk being stirred up so soon after them going in it?

Chris

 

[OldMan47]

The lower temperatures were not low enough to bother endlers or cories so we must look elsewhere for the possible problem.
Depending on the source of your cories, they could indeed be quite sensitive right after being added to the tank. Chances are that they were received within the last week at the LFS too. MAny, if not most, cories that we see in our shops are wild caught. If the wholesaler has not held them for a while and treated them for any diseases that they have, there will be large numbers lost when they are shipped around the world. Endlers on the other hand are tough as nails fish that are used sometimes to help improve the hardiness and colors of a weakened line of guppies. A small mix of endler into a guppy strain can give it a real boost because endlers are only a few generations away from wild fish that exist in environments with lots of frequent variation. Any innate weakness in that group would be more likely an indication of poor rearing conditions by the breeder.

 

[ghhghh]

How long had u had the fish for?
If bot that long then it could be that the store has
ordered the fish recently and they are still recovering from
stress.