Backyard Aquaponics
A place to discuss aquaponics

I hope it doesn't come to that but my water temp is currently 17 and its not exactly hot out there right now.

Read back on some of the threads here... apparently water fountain does help control the heat rise by a bit...

The advantage of a larger volume of water though is that it takes a while for it to heat up. A one off hot day as we often get in the spring shouldnt be a problem in your system.

i just had to kill one small one, he was very very pale, and lethargic. gonna have hom for dinner but thinking of culling most of mine tomorrow before sunday :s

Charge your camera up and get your scales ready FB.....

i dotn want to make you guys too jealous though

After seeing the size of your first AP cucumber dont think you should be too worried.

Im with you FB, having only 900L FT's the heat seems to be carrying through the night now and dont get a chance to cool too much.

Air is flat out and hopefully get through till monday when I finish this swing at work.

Outside systems on 19 and 18 today with no shade. I am guessing be next thursday they could be hitting 25 but thats all good for me, with silvers and catfish and jades
Could have kept trout right through last summer in my 2000L system as it only hit 25 for one day

check this graph out i found on the internets from a scientific journal
trout survived up to 27 deg water, but look how quickly oxygen consumption rises

Thats handy to know FB, thanks.

And bear in mind... that at the same time the oxygen demand of the trout is increasing with temperature rise.... the actual DO is decreasing towards about 50% of what it is at 20 degrees....

You are going to need ice tomorrow afternoon maybe, and definately on monday charlie. 2 big bags into 900 litres will drop around 2 degrees in total.

31 Sunday, 19 overnight, and then 36 on monday. Small systems will be finished. I'll be getting pretty close in my system too.

Do not feed your fish from today onwards if you want them to have a chance at living.

Is that the kal forecast?

Am I clairvoyant as I predict the phone will be ringing next week with " some of my trout have died?"
I try to tell people they must monitor their water temperature and start harvesting their trout as the water nears 23 degrees, but I am often met with a response that says " I was wanting to wait until the end of October or something like that.
START HARVESTING NOW- I do not want to be hearing " I lost all my fish."

Just because the weather Sunday is hot for trout does not mean that it will be warm enough for barramundi from Monday onwards. For those new to aquaponics, do not rush in to putting small barramundi in to replace the trout, make sure the water is consistently above 20 degrees and that the barramundi fingerlings are no less than 15cm.