Are my black Molly's pregnant or full of worms?

Colin_T said:

Hi and welcome to the forum

They could be both, gravid (pregnant) and full of intestinal worms but most likely worms. Common livebearers like mollies, guppies, platies and swordtails are regularly infested with intestinal worms like Camallanus, Capillaria and tapeworm. The fish eating well but doing stringy white poop would suggest they do have intestinal worms.

I just assume all livebearers are infected with worms and treat them while they are in quarantine. You can use Levamisole for thread worms, Praziquantel for tapeworms, or Flubendazole, which does both types of worm.

There is more info about treating intestinal worms in section 3 of the following link.

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...

www.fishforums.net

Click to expand...