I realize that the current weather conditions mean certain venues could be liable to an oxygen crash. What I don't understand is that rain crashing on the surface is apparently not good for oxygenation yet a fountain of water onto the surface or having an aerator going is good. Could somebody explain please?
In reply to Post #1
It's down to the temperature shock killing algae which deoxegenates the water
It's down to the temperature shock killing algae which deoxegenates the water
In reply to Post #1
I must admit that thought had crossed my mind also!
I must admit that thought had crossed my mind also!
In reply to Post #1
Good Ol Google...
"According to Carpology, an oxygen crash can be caused by two main factors. The first is an increase in organic load which could be caused by an algal crash, pollution, excessive baiting or leaf litter. This organic material is broken down by huge amounts of bacteria which strip oxygen from the water as they feed."
Good Ol Google...
"According to Carpology, an oxygen crash can be caused by two main factors. The first is an increase in organic load which could be caused by an algal crash, pollution, excessive baiting or leaf litter. This organic material is broken down by huge amounts of bacteria which strip oxygen from the water as they feed."
In reply to Post #1
The very rapid oxygen depletion during thunderstorms is due to low atmospheric pressure.... bit like opening a bottle of fizzy pop....
https://www.carpology.net/article/features/what-happens-when-there-is-an-oxygen-crash/
The very rapid oxygen depletion during thunderstorms is due to low atmospheric pressure.... bit like opening a bottle of fizzy pop....
https://www.carpology.net/article/features/what-happens-when-there-is-an-oxygen-crash/
In reply to Post #1
The worst and most devastating is when the water column “Inverts” last time it happened around my neck of the woods 12 waters got annihilated on the same Monday morning. It had been hot for weeks and then a few clouds drifted over cooling things down- including the top layers of the Lakes, the water got heavier – it sunk, forcing the dormant nutrient rich water from the bottom up to the surface along with all the bacteria, from gin clear highly oxygen saturated water to black coffee looking water with 2% DO readings in just a couple of hours!
The worst and most devastating is when the water column “Inverts” last time it happened around my neck of the woods 12 waters got annihilated on the same Monday morning. It had been hot for weeks and then a few clouds drifted over cooling things down- including the top layers of the Lakes, the water got heavier – it sunk, forcing the dormant nutrient rich water from the bottom up to the surface along with all the bacteria, from gin clear highly oxygen saturated water to black coffee looking water with 2% DO readings in just a couple of hours!
In reply to Post #6
I wondered if you'd see this Keith, was thinking of you seeing the forecast. Have the dark clouds been passing over like here or have you had the thunderstorms?
I wondered if you'd see this Keith, was thinking of you seeing the forecast. Have the dark clouds been passing over like here or have you had the thunderstorms?
In reply to Post #7
There's been people checking the DO readings on a daily basis for the past couple of weeks JP – readings have been fluctuating (As they always do) but no big sudden drops, there's been a bit of a breeze most days, thankfully.
No thunder storms at all.
There's been people checking the DO readings on a daily basis for the past couple of weeks JP – readings have been fluctuating (As they always do) but no big sudden drops, there's been a bit of a breeze most days, thankfully.
No thunder storms at all.
In reply to Post #8
That's great news, really glad its been a gradual temperature decrease, as you say with a decent breeze. Cross over from the spawning thread, the fish have started spawning again on a local water to me after a abrupt halt during the heat wave, theory being low DO caused it.
That's great news, really glad its been a gradual temperature decrease, as you say with a decent breeze. Cross over from the spawning thread, the fish have started spawning again on a local water to me after a abrupt halt during the heat wave, theory being low DO caused it.
In reply to Post #9
we've had no thunderstorms just a bit of rain most of Kent's hit hard spent all day yesterday burning dead fish
we've had no thunderstorms just a bit of rain most of Kent's hit hard spent all day yesterday burning dead fish
A lake near me in Essex has just been devastated over the last few days. Over 70 carp dead now and rising. They have been told nothing will survive. Years of work all gone...
Lakes struggling everywhere, very few with no issues.
Not good, I wondered if the reports would start coming in 
It's a soul destroying experience, from the start - dead fish will keep popping up for around a week as loads are still alive but brain-dead due to oxygen starvation.
Puzzles me why more fishery owners don't have a couple of Pumps on standby, ready to use all year round? There not that expensive to buy and convert, at least then you have a very good chance of saving everything.
Puzzles me why more fishery owners don't have a couple of Pumps on standby, ready to use all year round? There not that expensive to buy and convert, at least then you have a very good chance of saving everything.
In reply to Post #14
Llooked at two lakes in Hampshire this morning and two of them had small fish constantly on the surface as if they were gasping for some air. Hopefully all will be fine.
Llooked at two lakes in Hampshire this morning and two of them had small fish constantly on the surface as if they were gasping for some air. Hopefully all will be fine.