Fish Acting funning in early AM and late PM, but fine in between

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Chris Edward

Feeder Fish
MFK Member
May 3, 2016
19
1
3
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Hello All,
I have a few older very large goldfish and they recently have been acting very funny.
One seems to be ok at the moment but was also acting weird a few days ago.

The other fish is fine between the hours of around 9:30am to about 8 or 9 pm, it has been cold so both fish stay near the bottom and don't move much.
Between the hours of 9pm and 9:30 am this fish acts like it's at deaths door.
sometimes it hovers at the bottom on it's side, sometimes it comes to the surface and sort of bobs there with it's face coming out of the water.
The tank is set up to be an aquaponics tank, so I cannot get a very good look at it's gills so, don't know if this is a nitrogen thing, like brown gill disease.
The other fish seems fine now, so if it were an ammonia or nitrogen thing, wouldn't be effecting both fish?

Their filters are clean, the water is clear.
I just did a water change the other day and another one yesterday.
I need to do another ammonia test to be sure, but last time I did it, it came out ok.
It's one of those cheapy kits that doesn't give numbers just "ok", "danger", and "acid water" you know the type.

Up until a few days ago they were both fine.

Can anyone suggest what this might be?

Thank you in advance...
 
I will give that a try but the only way I have to heat the water is by boiling water on the stove.
I am unable to get a heater.
 
I am concerned about using the boiling water, because I don't want to burn a fish or cause too drastic of a temp change to cause more issues
 
Due to the way the tanks are set up I doubt it is an oxygen thing.
There is a 2 foot space between where the water drains out of the filter and the water level of the tank, so there is plenty of splashing and oxygenation. A pump couldn't do any better.
 
Chris Edward said:
Due to the way the tanks are set up I doubt it is an oxygen thing.
There is a 2 foot space between where the water drains out of the filter and the water level of the tank, so there is plenty of splashing and oxygenation. A pump couldn't do any better.
Click to expand...
So perhaps just a water change?
 
I just did a water change two days ago and another one as a precaution yesterday both about 25% each.
 
The fish seems to be going down for longer.
Then it comes up takes a gulp and goes back down.
I did a nitrate test and it is a little high, but not in brown gill territory.
This has me a bit worried about the bio filter because I detached no nitrites...

The other fish is fine, so if it were nitrate issues wouldn't it be effecting both fish?
 
I recently brought some new furniture in the room and it smells a bit, so I have a fan on, windows open and lots of air circulating to remove the smell.
Do you think this could have something to do with it?
 
I am trying to think of anything that may have caused this.
Unless my biofilter crashed but it looks the same.
 
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