My poor fish

[adamkenn]

3 straight days of over 30 degrees and all my Trout have died. Their water temperature has hit 25 degrees causing this. So obviously Trout are not a good summer fish for Adelaide without using expensive water coolers. So I pose the question what is the best fish for my location. Too cold over winter for Barra or Jades but too hot for Trout in summer ? What do you guys think ? From what ive heard silver perch will be very slow growing over our winters the water can drop as low as 10 sometimes.:frustrated:

[Byron]

others will chime in about this im sure but, 25deg shouldnt kill ur fish, my very novice (never had or looked into having trout) opinion is not enough oxygen in the water? all your other levels are good? ie ammo ni na pH?

[Erich]

I was 22.9 in the tank all night (and they are still eating), I have 40 in an IBC

Please tell me, whats your setup and what did you do to try and keep the temp down? Do you have aeration - like air going in? If so, how m uch :)

[RupertofOZ]

Water temps of 25... will kill your trout.... as will constant temps above 22....

You can alleviate matters by...


NO feeding
Mucho oxygenation
Culling down your stock density
Icing the tank at night
Changing out water as a front comes through and temps fall


Seriously... I think most people need to just bite the bullet and cull their trout... especially those in SA... it gets hot down there guys... and it's not really summer yet...

[Erich]

My temp is 21 and falling however I adopt everything John has posted above and also turn of GB throughout the day with the first flush of the GB going onto the lawn (super heated water and stones)

[Yabbies4me]

Not disagreeing with you Rupe, just offering my very recent observations in my system:

My trout survived a day of 26.7º water temp. The day after it only dropped to 26.1º and for the three days following that it was at 25º. They were very slow, but they survived. When it dropped back below 24º they showed some interest in food again, but were still very slow. I left them for a few days and they didn't pick up so I pulled them out and changed over to the Barra for summer.

It's all about the Oxygen, but no matter how much oxygen, any sustained period above 25º knocks them around.
.

[Jens UK]

a fan above the ft can help too, i took 1 degree temp out of the ft with an office fan pointing at the water. only ever struggled for 3 days in june with high temps. put 2l bottles with ice in as well

[Erich]

good point :)

[adamkenn]

Ended up biting the bullet and culling the rest before they all died. I am using 2 nally bins each had about 20 trout each. air stones in each tank and water levels all good. I have 30 juvenile silver perch in the same tanks and they are fine.

[Erich]

temp down to 17, fish doing back-flips try to catch the food when I throw it in ;)