Weird belly on one of my zebra danios

I've had my zebra danios since I've had my 60 galloncommunity tank, over a year now. I noticed that one of my zebra danios has a strange belly shape, at first I thought maybe she's full of eggs but it's not the typical rounded belly, it's lopsided.

anyone know what's going on with her

 

Water parameters are all good,
Ammonia 0, Nitites 0, Nitrates 5; ph is high 8.2 but it's always been that way from the start; very hard water
Community tank w/2 Angels, 4 mollies, 2 juvenile mollies, 3 platies, 1 DG, 1 albino bn pleco, 2 Amano shrimp, & 9 zebra danios (including one that I'm asking about)
Fish are all healthy & normal. Diet of seachem flakes (has garlic & antibiotics it says in then), tetra flakes, occasional blood worms.
Danios in question has no issues besides the lopsided belly.
No other fish are having issues.
I do weekly 20-25% pwc. Mildly planted. I use prime, vitachem & flourish.

 

Hmm.... sometimes my Zebras eat too much and have a lopsided look to their belly, but it usually subsides by the next day, and since their stomach goes almost under their chins I can tell that's not what's happening with your danio, as the swelling is near the vent, maybe constipation? have you tried feeding it peas?

 

Haven't tried peas this time but did fast whole tank for 2 days to see if it's belly would go back to normal but it didn't/hasn't. I'll try the peas now & see if it gets better.

 

Yea, I hope it gets better...