Goldfish poop is white and lumpy...

My Veiltail poop is white stringy and lumpy... I searched over the internet it said that she may not be eating but she is eating!!! I always see her until she finishes it off. To be honest even when she had was too sick she never had a loss of appetite. So the second things comes to my mind is that she may be facing internal bacterial/parasites infection.
I'm explaining the whole situation below if anyone knows about this please let me know!!

So sge had Ich because I introduced a new Fantail which developed it and then died because of it. And my Veiltail too got it and I don't know how there was a sudden spike of ammonia and Veiltail got burn her tail. Like there was black marks on her tail. I did a water change but things didn't improved. And to be honest and I'm ashamed of saying this too that in my area I'm not able get freshwater for tank. It's been days that even freshwater is coming as dirty as ****! So I had to keep her in bucket as didn't have 33 gallons of water!!! She was still doing fine with eating and whenever she sees me she wags her tail and move around!! But most of the time she stays in the bottom, I kept heater in her bucket too and then felt a bit good but again she sometimes goes to bottom and do nothing.

I thought she will recover with the ammonia burn and stress but now I noticed that white poop. In her bucket I have added bit of salt, rid ich to be sure she doesn't get it again (but very little amout) and mela fix!!

Now I need advice for what I should do now??? I'm ready to do anything for her... She is my favourite. I just can't loose her like this.
For now I'm planning to do cycle my tank as soon as possible (asap I get good water)

 

its possible that the new fantail brought in more than just ich. could also came from the dirty freshwater if it wasn't properly disinfected at the water facility.

i qt all new fish for 2-3 weeks with Hikari Prazipro.

 

I don't think so... Even with ich they both were playful with each other. And Veiltail didn't showed these issues at that time. It's been a week that my Fantail died.

 

It could just be stress...Sudden change of environment, losing a friend all could cause stress potentially, ick also probably has some part in all of this... you have an aerator or a filter in the bucket... right? if it's stringy poop, it could also be indigestion/ constipation... you might want to feed your veiltail boiled peas

 

Peas... Okay I'll do it. And yes I have a filter in bucket plus heater.

 

It could just be stress...Sudden change of environment, losing a friend all could cause stress potentially, ick also probably has some part in all of this... you have an aerator or a filter in the bucket... right? if it's stringy poop, it could also be indigestion/ constipation... you might want to feed your veiltail boiled peas

Thank you... I think it worked as I didn't see any white poop it was lumpy and light in color but I think it will recover day by day.
I'll update for anything else...

 

It could just be stress...Sudden change of environment, losing a friend all could cause stress potentially, ick also probably has some part in all of this... you have an aerator or a filter in the bucket... right? if it's stringy poop, it could also be indigestion/ constipation... you might want to feed your veiltail boiled peas

Here is an update!!! So, my Goldfish didn't had any disease she was pregnant!!! It was my first time so I couldn't recognise the signs but that laziness was because of pregnancy and her poop problem hasn't occurred again. The Fantail which died due to ich was a male these are his. But unfortunately he is not here so they won't be able to become fish.
My sister was too excited to see them ( she thought they will just hatch anytime) but I yold her that that will not be the case. And yo be honest I too didn't wanted to breed as it is a responsibility of hundreds/thousands. I think I'm not able to carry that right now. May be in future.

But thank you for your help.