Clownfish Sudden Blindness?

[ncsuben]

I have two young tanks a 90g and 15g and am following the serious reefs cycling method. Purchased two clownfish (mocha and a fancy white semi) who went through the same quarantine in a divided 10g tank: 2 - 6-hour prazi pro baths (once upon arriving and then again ~a week later), copper power (2.5 - 2.65), and metronidazole dosed q48h with whole water changes every 3 days.

Fish did great in quarantine. Main tanks read 0 ammonia, nitrates -15 ppm (not 10 and not 25 on the salifert). So both fish placed in respective tanks Sunday morning.

Both were doing great until yesterday. The fancy white semi (of course) in the 15g started swimming circles around the tank and running into things. No outward visible concerns, no rapid breathing, no cloudiness to eyes.

However, it doesn’t even seem to know where food, hands, or nets are unless they run into him.

Sunday through Monday he was just hanging out in one corner. After he displayed these issues I found salinity was a bit low - 31 ppm due to an ATO issue. I drip acclimated him to 35 ppm and checked all tank parameters which stand at:

SG: 35 ppm
Temp: 77.4 (controller set to 78)
Alk: 8.3
Nitrate: 10-15
Phos: 0.036
Ammonia: 0

Mocha clown in the 90g is fine with no issues.

Video of him this afternoon after being moved into quarantine tank with divider, PVC, no meds this morning:

I know there’s probably not much I can do but wait, but I don’t want this to happen to another fish I may put in that tank. Thoughts?

 

[ncsuben]

@Humblefish would a methylene blue bath help? I just ordered but won’t get here until Friday.

 

[vetteguy53081]

I have two young tanks a 90g and 15g and am following the serious reefs cycling method. Purchased two clownfish (mocha and a fancy white semi) who went through the same quarantine in a divided 10g tank: 2 - 6-hour prazi pro baths (once upon arriving and then again ~a week later), copper power (2.5 - 2.65), and metronidazole dosed q48h with whole water changes every 3 days.

Fish did great in quarantine. Main tanks read 0 ammonia, nitrates -15 ppm (not 10 and not 25 on the salifert). So both fish placed in respective tanks Sunday morning.

Both were doing great until yesterday. The fancy white semi (of course) in the 15g started swimming circles around the tank and running into things. No outward visible concerns, no rapid breathing, no cloudiness to eyes.

However, it doesn’t even seem to know where food, hands, or nets are unless they run into him.

Sunday through Monday he was just hanging out in one corner. After he displayed these issues I found salinity was a bit low - 31 ppm due to an ATO issue. I drip acclimated him to 35 ppm and checked all tank parameters which stand at:

SG: 35 ppm
Temp: 77.4 (controller set to 78)
Alk: 8.3
Nitrate: 10-15
Phos: 0.036
Ammonia: 0

Mocha clown in the 90g is fine with no issues.

Video of him this afternoon after being moved into quarantine tank with divider, PVC, no meds this morning:

I know there’s probably not much I can do but wait, but I don’t want this to happen to another fish I may put in that tank. Thoughts?

No metheyne blue and how was fish acclimated to the tank?
Often this happens from trauma, injury or high nitrate and ammonia levels. In addition, can be genetic or retina damage but can be neurological ,but moreso, can be caused by flukes. In addition, can be impact injury from physical trauma leading to neurological symptoms and blindness changes the appearance of the pupil and often non-treatable. Some blind fish will seek food, and live a few years as long as there is no bully causing additional stress

 

[ncsuben]

I have two young tanks a 90g and 15g and am following the serious reefs cycling method. Purchased two clownfish (mocha and a fancy white semi) who went through the same quarantine in a divided 10g tank: 2 - 6-hour prazi pro baths (once upon arriving and then again ~a week later), copper power (2.5 - 2.65), and metronidazole dosed q48h with whole water changes every 3 days.

Fish did great in quarantine. Main tanks read 0 ammonia, nitrates -15 ppm (not 10 and not 25 on the salifert). So both fish placed in respective tanks Sunday morning.

Both were doing great until yesterday. The fancy white semi (of course) in the 15g started swimming circles around the tank and running into things. No outward visible concerns, no rapid breathing, no cloudiness to eyes.

However, it doesn’t even seem to know where food, hands, or nets are unless they run into him.

Sunday through Monday he was just hanging out in one corner. After he displayed these issues I found salinity was a bit low - 31 ppm due to an ATO issue. I drip acclimated him to 35 ppm and checked all tank parameters which stand at:

SG: 35 ppm
Temp: 77.4 (controller set to 78)
Alk: 8.3
Nitrate: 10-15
Phos: 0.036
Ammonia: 0

Mocha clown in the 90g is fine with no issues.

Video of him this afternoon after being moved into quarantine tank with divider, PVC, no meds this morning:

I know there’s probably not much I can do but wait, but I don’t want this to happen to another fish I may put in that tank. Thoughts?

No metheyne blue and how was fish acclimated to the tank?
Often this happens from trauma, injury or high nitrate and ammonia levels. In addition, can be genetic or retina damage but can be neurological ,but moreso, can be caused by flukes. In addition, can be impact injury from physical trauma leading to neurological symptoms and blindness changes the appearance of the pupil and often non-treatable. Some blind fish will seek food, and live a few years as long as there is no bully causing additional stress

Acclimation in terms of water - floated in bag for 15 min, small aliquots of water from tank added to bag in 10 min increments to allow other parameters like nitrates, pH, etc equilibrate.

Then he was placed in the tank prior to lights coming on. Lights came on and he was fine all of Sunday, all of Monday, eating well, coming to where food was placed, etc.

Tuesday morning, before his tank lights came on noticed he was “more active.” Turns out this was him swimming in pseudo-circles and changing direction upon bumping into things.

Given he was quarantined with the other clown who is fine and put through prazi x2, metro q48h for 14 days, and copper, I don’t see how parasitism could be a thing but suppose never say never.

Hard for me to evaluate fish eyes (used to cats and dogs as I was a small animal vet for 6 years). His pupils look the same as the clown in the 90g. Would I be able to see pupillary constriction if I use my phone flashlight on a lower power? I assume I’d have to isolate him in like a sandwich bag to assess. Absolutely no obvious outward abnormalities, no rapid breathing. I do think I can see prominent blood vessels on his temples…but that may be me seeing things. He may have a displaced scale on his chin from running into things too…but no lesions.

I too am thinking blunt force trauma/injury. I will say the guy at the LFS caught him immediately and he’s always been easy to catch…vs the other who swims like mad to get away.

Thanks for the help…of course it was my wife’s favorite one…and the more expensive one