Single grey spot on Singapore Angel, is it flukes?

[level99fishing]

Oh! I didn’t know you were using alcohol, solvents cause major problems with bacteria blooms. You need to aerate the heck out of the tank. It is better to disperse the prazi through a brine shrimp net as opposed to using solvents. If you do use a solvent, you need to use the absolute least amount that will just barely dissolve the prazi - more like a slurry.

I didn't even use enough to dissolve all of it. It was about 20-25ml of a 50% alcohol content drink.

The fish are doing fine, not acting any different. I read prazi should work within 24 hours. It has almost been 48 hours now. Would a 1/3 water change now reduce the efficacy of treatment?

 

[Jay Hemdal]

I didn't even use enough to dissolve all of it. It was about 20-25ml of a 50% alcohol content drink.

The fish are doing fine, not acting any different. I read prazi should work within 24 hours. It has almost been 48 hours now. Would a 1/3 water change now reduce the efficacy of treatment?

Prazi needs to be dosed multiple times because many flukes are egg layers and prazi doesn’t kill the eggs. Two treatments, spaced 8 days apart is the minimum.
Prazi is broken down by bacteria pretty quickly, so a water change now is no problem.

 

[level99fishing]

Prazi needs to be dosed multiple times because many flukes are egg layers and prazi doesn’t kill the eggs. Two treatments, spaced 8 days apart is the minimum.
Prazi is broken down by bacteria pretty quickly, so a water change now is no problem.

I did the water change and water is much clearer now. I'm horrified to find that there are now a load of grey spots on the angelfish. Again, swimming completely normal, feeding as usual, grey spots are flat, no other abnormalities. Other fish are completely normal as well without any grey spots. 2 doses of praziquantel already, seems like this is not flukes. I'm at a loss as to what this can be. Below is a picture, what do you think? Notice the that not all the spots are round. Some are irregular in shape.

 

[Jay Hemdal]

I did the water change and water is much clearer now. I'm horrified to find that there are now a load of grey spots on the angelfish. Again, swimming completely normal, feeding as usual, grey spots are flat, no other abnormalities. Other fish are completely normal as well without any grey spots. 2 doses of praziquantel already, seems like this is not flukes. I'm at a loss as to what this can be. Below is a picture, what do you think? Notice the that not all the spots are round. Some are irregular in shape.

Some angelfish, (this species and emperor angels) tend to show any skin disruption very clearly, by the skin blanching around the site of the problem. These could just be the sucker marks from where flukes had been on the fish. That said, the same reaction will show up on these fish if they have ich, so I cannot tell you which this is.

If the fish has no other symptoms - just watch these carefully. Looking at photos from day to day, if the spots are in the same location in the same number, these are just fluke wounds. If the spots change location and change in number (generally increasing) then it is ich.