Fish kicked the bucket during a water change....

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Niki_up said:
I used 3 capfuls when I changed out the water in the 90g.

edit* if that’s the case then I should have use between 5-6 capfuls of prime instead of the measly 3 capfuls I used today.
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If each capful is still 5ml, then 4 capfuls would have been plenty. Even still, 3 capfuls shouldn't have caused that kind of sudden death in your fish? At the most, you might have suffered a small ammonia spike once the chlorine and ammonia split. BTW - I have always treated for the entire tank volume, with Prime and with Safe.

I don't know anything about black fluorite sand, but I would be suspecting that before an underdose or overdose of Prime.
 
RD. said:
If each capful is still 5ml, then 4 capfuls would have been plenty. Even still, 3 capfuls shouldn't have caused that kind of sudden death in your fish? At the most, you might have suffered a small ammonia spike once the chlorine and ammonia split. BTW - I have always treated for the entire tank volume, with Prime and with Safe.

I don't know anything about black fluorite sand, but I would be suspecting that before an underdose or overdose of Prime.
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I have only had this happen with bleeding heart tetras before. Death upon water change, always sudden and no way to stop it.

currently all other fish are doing great and no cloudiness from the sand.
 
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Niki_up said:
Maybe some sand got in the gills and caused damage...?
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I would kind of expect to see other fish affected in some way though. Unless the affected fish swam into a momentary cloud of heavier particles that quickly settled afterwards...
 
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squint said:
I'd be curious what pH/TDS/temperature difference there was and how rapidly you refilled the tank.

Speed kills.
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I didn’t do any water testing this time as my waters change schedule is the same every week. my tap PH is the same as my tanks. I don’t have a way to test for TSD, temperature difference was a few degrees cooler but not cold. Filled as quickly as a python fills the tank.
 
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squint said:
I would kind of expect to see other fish affected in some way though. Unless the affected fish swam into a momentary cloud of heavier particles that quickly settled afterwards...
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I didn’t see any fish swim though anything and they moved away from the location I was adding the sand to...doesn’t mean it couldn’t have happened though either.
 
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Gill bleeding and sudden death = symptoms of severe acute toxicity.

In my mind I have ruled out the chloramine in your local Epcor water, with the amount of Prime that you used. All other things considered an under dose of Prime makes zero sense to me.

That leads me back to "what else took place prior to this event?" ……… which was the addition of the black fluorite sand. There are other things that could have taken place that could have shocked a more sensitive fish/species, but the bleeding from the gills, that sounds more like exposure to an irritant - perhaps a very fine irritant, such as ultra fine dust from sand.

I'm not sure what brand you used, but I will make an assumption that it was Seachem, a trusted brand, but after reading some reviews it seems that others suffered some fish losses after adding this sand - even after rinsing it several times before exposing their fish to it. And there are numerous complaints about how fine/dusty/dirty it is, even after rinsing multiple times.

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Regardless of the brand name, and while I certainly don't believe every sob story that I read on Amazon reviews, contamination of any product such as this is also a very real possibility.

Sorry that you lost the fish.
 
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