Help invisible killer in perfect water

[Aquaman021]

So my tank the water is deadly for some reason there is 0 ammo nitri nitra when I put a feeder in the water it starts to fade a little white which doesn't show in the pictures I'm gonna attach and it would die within 15 mins I'm doing a 100% water change atm

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[Aquaman021]

My piranha was in there for 5 mins I put some feeders for him and they died in 2 mins I instantly removed him to my main tank now his trying to eat my arow through the glass the bad water didn't effect him but tip of his fins were fading white which are gone now and he looks awesome now cuz of good water so if any one has any idea what's wrong in my other tank let me know BTW the bad tank has been only running for a month.
Thx

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[hamster]

I would let it cycle longer and stop doing water changes let it sit. Have you put any chems in?

 

[Aquaman021]

No just just water conditioner and added amquel plus

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[Aquaman021]

And bacteria from my cycled tank

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[hamster]

All I can think is it hasn't cycled yet have you done a test?

 

[strollo22]

Even if the tank hasn't been cycled, his parameters are 0. I'm think stray current in the water


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[hanwyz]

Could the pH be wildly different to the previous water the fish were in?

 

[hamster]

Even if the tank hasn't been cycled, his parameters are 0. I'm think stray current in the water


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I was thinking along the lines of a spike from the bacteria that was added. Im out of ideas. I also was thinking no air in the water but it looks good from the pictures.

 

[theomega]

Check temp as well

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