New fish bloated after power outage

I picked up a breeding pair of Telmatochromis Temporalis "shell" on 8/24 and they were healthy but never really settled in. I checked on them and tried to feed them daily and noticed nothing unusual except not eating after a few days. I was without power from 8am sun to 4am mon but I had a generator running the filters for most of that time. Monday morning when I checked the female was bloated. They have not eaten since I got them. I tried NLS cichlid, NLS Thera A, NLS garlic flakes and frozen blood worms, leftover food removed after several hours.

pH - 8.3
KH - 11
GH - 20
TDS - ~600
Temp - 76
Ammonia - was .25 before a WC yesterday, every other day and today it is 0
Nitrite - 0
Nitrate - 5 before WC, 0 now

20g long
colorquartz T grade white sand
Moss rocks
boiled & scrubbed PVC elbows
Eheim 2213
Bubbler

Water hardened with Cichlid salt buffer and espom salts.

Her scales are not protruding like is typical of dropsy and she obviously is not constipated, what else could it be? I am sure she is stressed, new home with no other fish (other fish swimming around make shell dwellers feel safer), not eating, some ammonia, WCs, power outage....it's a lot for a little fish in less than a week.

Thanks. Could I use Maracyn Plus instead?

Neither one has eaten. They lay on the bottom like that often, kinda like a mudskipper/goby pose, or on a rock so I believe that is normal for them. She moves around normal, not very active but neither of them are very active. They have dug lots of pits though so I think that's a good sign.

Some pictures showing them in the pose.



I read about it somewhere too, "holding leaves", just can't remember where it was.

Thanks for the tip about growing some algae, I'll . It a QT tank that is why it is "sterile".

I see what you're saying now. Yeah her big belly makes the goby pose a little awkward. She definitely moves around but that is her favorite spot. I was thinking maybe egg bound too because I have seen photos of these female with larger then normal bellies before breeding just not this large. I have about 2 tbps in there (probably only 17g of actual water) so it is already pretty high. Thanks helping me out Nicole!