Betta WHITE POOP?? Help needed

[Navfish]

Hi I have my 2 bettas in a temporary 5gallon tank. I’m going to move them to a ten gallon soon. But my betta seems to have white poop. The water quality is fine as in ammonia=0 Nirite=0 and Nitrate=20. He is a little lethargic. Is it internal parasites? If so, what medication would u guys recommend? Could I use ichx or is that only for ich?
Sorry for the bad quality photo

 

[connorlindeman]

Heres a thread that outlines treatment for stringy white poop.

What to do if your fish has Stringy White Poop.

Fish do a stringy white poop for several reasons. 1) Internal Bacterial Infections causes the fish to stop eating, swell up like a balloon, breath heavily at the surface or near a filter outlet, do stringy white poop, and die within 24-48 hours of showing these symptoms. This cannot normally be...

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