Velvet?

Its the start of rainy season here. Noticed some of my severums seem stressed, their bars were all out about 2-3 days ago, yesterday , Saw one with white powder on him. Today another one. Caould it be velvet?

What i did was dissolve rock salt, I also turned on heater to 28 Deg and Added some melafix. Will salt be able to get rid of velvet?

I added about 1 tablespoon per 5 gallon salt. Is this enough?

I have an arowana and a pleco in the tank.

Hi,

Here are some pics of the affected fish





does it look like velvet?

thanks, Will try to get some clearer pictures, but it looks like shedding their slime coat, or rot

was looking for fish disease and it does look like costia,
Could it be from the new fish added? I added some true parrot cichlid about 1-2 weeks before this happened. weather also suddenly changed

btw i added salt to concentratuion of 1 tbsp per 3 gal water

Hi,

Here are some more pictures, I tried to add salt to my tank to increase concentration, but noticed my arowana seems stressed and breathing harder, So i made a 20% water change . I also increased the thermometer setting to 30 Deg.







Any advise?

thanks.

really need help with this. after treatment with Azoo anti ectoparasite for 3 days as intructed in the box, some of my fish are still sick . don't know what to do now

any advise?

Its so hard to take pictures.
should i separate the affected fish? my tank is a 300 gallon tank