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This is a complete mystery. Perfect water and dead fish.

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Comment by Barbara Tealby on June 23, 2021 at 8:35
Fussy things, fish!
Comment by Andrew Cumberland on June 22, 2021 at 20:18
Barb. I rang Rob (he's a mate). He came up with the same opinion as me. Probably the sudden drop in night temps about 2 weeks or so ago.
Dave. No chlorine because I only use rainwater for them. No water run off into the tank.
I'm going to buy a floating thermometer so I can keep an eye on the water temp. I didn't think I needed to but this might have proved me wrong. The deaths do correspond with the sudden drop in night temps.
Comment by Dave Riley on June 22, 2021 at 9:52
Not that I'm an aqua man...but I'm thinking, Watson, that the game is afoot. Either poisoning or lack of water oxygen.
If it was hot weather, the oxygen issue would make sense, but not in the cold.
If a toxic substance, where did it come from?
There has to be a variable...a foreign source. I assume chlorine levels are checked and the water is conditioned. Did the conditioner fail? By the time you get to checking the water it could have reverted to safe levels.
So when was the last time you added water?
Is there a water run off into the setup.
Is there any microbial life active in the water? If that is absent, what then?
I've just watched
'Knives Out' again and am speaking with a Louisiana accent.
Comment by Barbara Tealby on June 22, 2021 at 6:10
I know you're not looking for sympathy, but you've got it anyway - so sorry, what a disaster. No idea what could have happened. Rob Bob does lots of aquaponics. Is it worth contacting him to see if he has had a similar experience?

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