I have 2 fish that sink atm. One Shubunkin and one comet. The comet, called Flat, spent the first 4 years of he life on the bottom of the pond, then suddenly she was fine. After a lot of rain the pond ph dropped to 6.4 and she's now a sinking Flat again. She comes up for food, gulps air to help her up then drops to the bottom. I make sure she gets a feed. The other is only 2 and really struggles off the bottom, her name it Pink. I realized the common fault was fly spray. Both lost their swim bladder ability from that. they sink tail first. Flat came good for about 2 years and hope she and Pink will get better. I add sinking food that Pink loves but Flat prefers to come up. What I'm saying is it could be anything but Flat is getting better and I hope your Sally does too.
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Flat had been fine for 2 years, I sprayed a large black spider in a frame near the pond and the wind suddenly changed and a film of the spray landed on the pond. A few days later I had 3 fish on the bottom of the pond, a few more days later 2 had recovered but Flat who had it before didn't but is getting better each day. Same with the other pond, flyspray landed on the surface and Pink sank. She's pink as she's a shubunkin that hasn't developed her colour yet. She's still at the bottom but I use sinking pellets down the sloping side when the others are busy eating so that she gets a feed. She knows where to be for her special food haha I tried shelled peas but didn't work@Sisha Interesting that your fish “lost their swim bladder ability“ due to fly spray! What makes you think this? Just curious. In my limited knowledge, I always thought that “swim bladder disorder” was caused by one or all of these: poor water quality, poor diet (leading to constipation), bacterial infection, genetics (some fish are more prone to this), injury, or tumor. I suppose that toxins, such as “fly spray” could be considered.
How to Fix Swim Bladder Disease in Fish - Fish Vet
What is a swim bladder and how does it affect fish health? As a fish owner, how do you know if your fish has swim bladder disease?
Did that immediately. In South Australia it's rare to get rain let alone that much which is why it caught me off guard. Will know if it ever happens again though
Don't know where "introductions" is
I'd add that fly spray is highly toxic i would think they wouldn't make it in a closed environment how big is the pond@Sisha Interesting that your fish “lost their swim bladder ability“ due to fly spray! What makes you think this? Just curious. In my limited knowledge, I always thought that “swim bladder disorder” was caused by one or all of these: poor water quality, poor diet (leading to constipation), bacterial infection, genetics (some fish are more prone to this), injury, or tumor. I suppose that toxins, such as “fly spray” could be considered.
How to Fix Swim Bladder Disease in Fish - Fish Vet
What is a swim bladder and how does it affect fish health? As a fish owner, how do you know if your fish has swim bladder disease?
Like you wrote this answer in the topic: “Fish & Koi Talk.”
It's about 18,000 litres. I can't think of any other coincidence that happened then except the fly spray and both Flat and Pink where always the first up for a feed