Is it safe to put them back togethor

[Jerriel]

So last Decemeber I had an ammonia spike and lost alot of my baby fish, I was only able to save 1 baby fish, but luckily all of my albino corys survived and recovered quickly, the only signs they show me that may be conserning is that they aren't as active anymore, but then again I cant tell if that's because there in a completely empty (other then the necessary equipment of course) tank. The baby fish, I can't tell if its sick or not, and the adults seem to be behaving the best they have in months, only conserning thing is that 1 of them has a white spot, its not a big spot, but its not like a little spot either. Other then that those fish act as if they have nothing wrong with them. What I was wondering is if it would be safe to put the fish back together again, its been 3 months and that baby was 2 months in December, so its at a size where it can't be eaten.

 

[GuacTop3792]

Does the white spot appear fuzzy and how big would you say it is? I wouldn’t put any fish into the tank if there is a potential issue with that white spot. I would suggest quarantining the one adult fish with the spot, giving it a salt bath, and keeping an eye on the spot. If it’s something harmful, you don’t want it spreading to other fish!

I would also suggest doing a water change in the tank with all of the adult fish, to help flush out any harmful bacteria. What are the parameters in your tanks?

 

[Jerriel]

Does the white spot appear fuzzy and how big would you say it is? I wouldn’t put any fish into the tank if there is a potential issue with that white spot. I would suggest quarantining the one adult fish with the spot, giving it a salt bath, and keeping an eye on the spot. If it’s something harmful, you don’t want it spreading to other fish!

I would also suggest doing a water change in the tank with all of the adult fish, to help flush out any harmful bacteria. What are the parameters in your tanks?

The white spot isn't fuzzy, the fish has had that white spot since January and the white spot never appeared on the other adult fish I had it with. The tank 2 adults are in is a 10 gallon while the tank that the cory and juvenile are in (the tank I want to move the adults to) a 29 gallon tank. Its hard to explain the size of the dot. But its not big.

 

[GuacTop3792]

If the spot hasn’t grown in two months and isn’t harming this fish, then maybe it’s a part of the coloration? I’m not too familiar with corys...
If the tank size is compatible for all four of your fish (at adult size) then they should livecomfortably in the 29 gallon.

 

[Jerriel]

If the spot hasn’t grown in two months and isn’t harming this fish, then maybe it’s a part of the coloration? I’m not too familiar with corys...
If the tank size is compatible for all four of your fish (at adult size) then they should livecomfortably in the 29 gallon.

Oh the white spot isn't on a cory, I guess I should've cleared that up, the white spot is on a platy, basically I have a tank with 2 adult platy, one of which has the white spot, and I want to move them into a tank with the juvenile and 4 corys.

 

[GuacTop3792]

Ah, okay! I would definitely be cautious about the spot.
I would find out what tank size requirements for plates and corys at full grown are, as well as what their standard tank parameters should be (ph, temp, etc.) and their temperament. That information should help determine whether or not they can be in a tank together.
That’s all I can speak on. Hopefully someone with more knowledge can be a bit more helpful