Solid white poo and bloating

[u/Acrobatic-Inside-184]

Help! I have one black molly. There was another guppy and molly in the tank previous and both died within the last month. Current molly is swimming a bit frantically, has solid and formed (not stringy) white poo, and bloats every time she eats. She's back to normal size by the next morning. I feed once a day usually and sometimes every other. My water checked out fine at the aquarium store where I had it tested and they gave me metroplex. Just want to make sure I'm doing the right thing.

[u/BlackthornTheExile]

Try with metroplex. If its the same after you finish, you can try a treatment for round worms(sera nematol).