Sorry to hear you're having trouble. Things can get kind of mysterious at times. You don't mention the source of the water you are using for changes. Could it be that something has changed there? I found years ago that the parameters of the tap water where I'm at has some fairly significant seasonal swings. I'm using RO water now for that reason.
Mystery illness and death.
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Let me try to get a picture of the worst Serpae in my 60.
In my 20 I pinched off the worst Algae covered leaves, gave their Anubias and driftwood a good scrub and pulled out the AR mini all together. In the process I counted 10 or 11 Cories so it isn't as dramatic as I thought. The little ones I found look totally fine. My Boraras and 2 Otos are happy and healthy. The Cories have no symptoms other than erratic somersaults going pale and trouble staying upright, then death. I've stopped spot treating with Excel, ran carbon and turned on their UV.
I'm using prime to dechlorinate, no other additives except for the Stress Guard I was trying. The only pH adjusting is with wood/almond leaves/CO2 and even that is negligible.
I have the Phosban and polyfilter in case parameters go haywire with spring/summer planting and run off into the lake the water comes from. I would be doing water changes from a dedicated pre filtered trash can at that point.
Here are some pictures of the Sick Serpae, the camera makes the white parts on his head look worse than it is. The second picture the colors are more accurate.H
e is behind the SAE and you can see the white lump pretty clearly.
He's had the white lump on his tail for over a month with very little change and the peeling looking stuff on his head for maybe a week. It looks slime coat related rather than actual deeper injury. There is a second Serpae that is looking a little bloated and his side has a greyish sheen, like he might start the peeling too.
The other fish are all fine, one of my danios has regrown nearly an entire tail fun while this guy is slowly getting worse.
The stupid Danios bother other danios, Kribs Chase Kribs, the SAE are peaceful and the Pleco whips her tail about her food but otherwise is peaceful.
No one bothers the Serpae but being down to 5 is causing them to hide by the filter most of the time.
I've spent hours today sitting in front of the 20 just watching and the Cories are actually out and about, swimming in the midwater column. They look wonderful, from 2 feet away, nice color, round bellies, fins are good. This is more than I've seen them in weeks, I'm cautiously optimistic.
In my 20 I pinched off the worst Algae covered leaves, gave their Anubias and driftwood a good scrub and pulled out the AR mini all together. In the process I counted 10 or 11 Cories so it isn't as dramatic as I thought. The little ones I found look totally fine. My Boraras and 2 Otos are happy and healthy. The Cories have no symptoms other than erratic somersaults going pale and trouble staying upright, then death. I've stopped spot treating with Excel, ran carbon and turned on their UV.
I'm using prime to dechlorinate, no other additives except for the Stress Guard I was trying. The only pH adjusting is with wood/almond leaves/CO2 and even that is negligible.
I have the Phosban and polyfilter in case parameters go haywire with spring/summer planting and run off into the lake the water comes from. I would be doing water changes from a dedicated pre filtered trash can at that point.
Here are some pictures of the Sick Serpae, the camera makes the white parts on his head look worse than it is. The second picture the colors are more accurate.H
e is behind the SAE and you can see the white lump pretty clearly.
He's had the white lump on his tail for over a month with very little change and the peeling looking stuff on his head for maybe a week. It looks slime coat related rather than actual deeper injury. There is a second Serpae that is looking a little bloated and his side has a greyish sheen, like he might start the peeling too.
The other fish are all fine, one of my danios has regrown nearly an entire tail fun while this guy is slowly getting worse.
The stupid Danios bother other danios, Kribs Chase Kribs, the SAE are peaceful and the Pleco whips her tail about her food but otherwise is peaceful.
No one bothers the Serpae but being down to 5 is causing them to hide by the filter most of the time.
I've spent hours today sitting in front of the 20 just watching and the Cories are actually out and about, swimming in the midwater column. They look wonderful, from 2 feet away, nice color, round bellies, fins are good. This is more than I've seen them in weeks, I'm cautiously optimistic.
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