Backyard Aquaponics
A place to discuss aquaponics

Hi guys, i have 1 trout die on me when i moved it from their current home to a 1000L IBC. It was hiding where the air stones was for 30 mins before i went to bed. 8 hours later i found him at the bottom of the tank.

Now i think it was the stressed that did it in. I had 80L/Min air pump running for a good few hours before i put him in and i put in the new water into the bucket with the trout and the old water for probably 30 mins before he went into the big tank.

I have had instances where i was down to 5cm in a 600L tank and filled it back up with tap water with no issues to the fish but this time the IBC had 100L of the old FT water and 900L of tap water.

I havent tested the ph (misplaced it) is there anything else you guys think would be the problem?

One thing i didnt do was float him for a while (dont have a fish bag)

Could have been just stress. What were the ph readings of the two systems and temps??

Will get new test results tomorrow, forgot where i put the readings from today.

I don't think 900l of tap water to 100l of old tank water is considered a top up. It is a huge water change.

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Yep your right, i thought by diluting the old FT water with the new water it should have been ok, guess not.

I will probably remove most of the water and use it to wash media then pump 100-200 worth of old FT water and leave them in that. I wont be pumping to the GB for a few days, whilst that is happening i will just fill it up slowly with tap water.

Here is the fish.

I will do the water tests when i get home, so busy putting in the GB and stuff this morning forgot to take the tests.

Yes, I agree it's probably stress. I have often lost fish when I do something major in my tanks. Barra are extremely emotional in my experience, sometimes taking days to relax again and eat.

Good luck.