Help My Glofish Are Dying

[symon_say]

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Tank size: 55 gallons
pH: 8.2 from the tap and in the tank
ammonia: yesterday 0.00, today almos 0.50
nitrite: 0
nitrate: 10
kH: don't know
gH: don't know
tank temp: 29, that's normal around here

Fish Symptoms (include full description including lesion, color, location, fish behavior): My glofish are dying, and i don't know why, they don't have any lesion, their color is pale, the seen kind of yellow, they are eating less, but their behavior is the same, the swing normally with a lot of energy

Volume and Frequency of water changes: this week i haven't done any water change, just right now i'm doing about 30%.

Chemical Additives or Media in your tank: what filter have, no carbon

Tank inhabitants: 6 cory, 6 guppy

Recent additions to your tank (living or decoration): the 6 cory have in for just a few days, and problems start right after they are here.

Exposure to chemicals:

They were nice, almost 3 weeks, as soon as i have my tank completely cycled i add the 6 corys, about 3 days ago, the next day one of the glofish died, and today i found another one dead, the seen pale, kind of yellow.

What is this, and what can i do???

 

[hillmar77]

You gonna need to do a major water change to bring down the ammonia first off. Second you need to start hunting for any uneaten food or something rotting in your tank that is causing this spike in ammonia. Solve that problem and see how your glofish react to the cleaner water.

 

[symon_say]

I did a 30% water change today, and will do another one tomorrow, maybe to 30% water changes tomorrow, 1 in the morning and 1 in the afternoon. To see if this helps.