Nearly wiped out ma tank!

[Lynz781]

Added anti fungus and finrot treatment to the tank and its probably killed some fish!!! Don't know yet. I have done a water change and they seem to have gotten better but they stopped swiiming. Do you reckon its an overdose??? Iput in less than your supposed to and I added some last night and they were fine?? Oh my god I'm so upset

 

[WILDER]

Right need to no water stats in ammonia,nitrite,nitrate,and ph, how many gallons and which fish and how many, what was the symtoms of the fish, are they gasping or looking pale in colour, or clamped fins.

 

[Lynz781]

Water stats are fine.
>13 uk gallons, 63 litres.
6 cories, they have recovered but are lethargic.
4 mollies (2 are juvenilles), almost normal self.
2 apple snails didnt appear to be affected,
One dwarf gourami, he went really pale and lay in the cocnut shell. But has perked up but still not quite right.
Lots of danios, different ages they couldnt swim, now they have appeared to have recovered but still not 100%.
I oto i think he might die, still pale.
Basically I think the treatment removed the oxygen from the tank and I've pretty much killed my fish.

 

[Lynz781]

Update: My mollys seem ok and back to normal self. Danios are swimming better but when I feed them they seem to have forgotten how to catch the food. They swim to it but really akwardly and I feel I may have done some irreversible damage to them. Cories are pretty much ok, feeding and darting up to the top as normal. Don't think the oto is going to pull through, I netted him and placed him near the top of the water next to the pump. It's been an awful night. It was horrible to see my fish like that. Just floating around completly helpless. So relieved when they started to come round when I put fresh water in.
I really hope they make a full recovery.
Anyone been through this before?

 

[WILDER]

Your well overstocked for that size tank get water tested as soon as possilbe, i would recommend some daily water changes till then.

 

[Lynz781]

Does anyone have any idea whats happened to my fish? They seem to have problems trying to eat now. Really clumsy.

 

[dwarfgourami]

My guess would be that the medications did some damage to the bacteria in your filter. I know you say the water stats are fine, but we've had plenty of threads in the past where water stats have seemed ok, but there have still been problems that seemed ammonia-related. The tank was rather heavily stocked and it might not take that much to create a temporary blip in water quality.

Does anyone have any idea whats happened to my fish? They seem to have problems trying to eat now. Really clumsy.

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[Lynz781]

I read that the medication can remove oxygen from the water and that plenty aerations should be provided. Last time I use it.