Fungal/cotton mouth??

[Hally M.]

Noticed a white consistency on my swordtails mouth. Not sure if I should be concerned or not. 

Ph 7.9

No ammonia no nitrite and a very small amount of nitrate. 
 

Kh was measured a couple days ago but looked good. 

Gh 230 ish 

Sorry the pictures are poor quality I had to zoom in because he wouldn’t come closer. Aside from the substance on his mouth he is behaving completely normal. No physical signs or abnormal swimming patterns. 

[Hally M.]

Scratch that, I believe he’s refusing fan food and I haven’t seen him engage in eating at yet since I got him a couple days ago and he’s just now starting to isolate with the female swordtail

[Hally M.]

I’m also noticing some stringy poop from the female? Some parts are translucent. The two are in a 20 gallon and just had 5 Tablespoons of salt added. What else should I consider for treatment if this could be parasites as well? 

[Colu]

White patch on the mouth can be caused by mouth rot often associated with columnaris or a fungal infections what I would do  as its not eating is quarantine if you can and treat with a combination of aquarium salt 1 table spoon for 2 gallons and do a course of kanaplex just in case there's a bacterial component @Hally M.

Edited July 16, 2023 by Colu

[Hally M.]

Thanks! I will try that.