Dwarf puffers

[Jonodk22]

Hi I recently purchased some dwarf puffers and noticed the other day that one of them had a reddish brownish thing hanging out of its anus now 3 of them have the same problem they are eating well live blood worms and snails anybody got any ideas oh the water tests well a0 n0 n05

 

[Tyler_Fishman]

That's prosy just waste.. a picture would help

 

[Jonodk22]

That's prosy just waste.. a picture would help

I think your right as I didn't feed them for a day and it cleared up thanks first time I've kept these fish learning a lot about them fast