Pea puffer thin and face down

[Lord dendrodoa]

Hi guys

I came home yesterday to find my little pea puffer (had since 6/12/2019) face down in the gravel. I thought he was dead but when I looked his eye was moving. I tried to offer him a snail with the forceps (he recognises and comes to them for food) but he didn't react. I dropped the snail infront of him and still no reaction.

Looking at him closely he is very thin, in the backend, swims only when I force him too (gentle blow with a pipette), and he has a bent in his spine toward his tail when lying but not when swimming. Frances looks normal when removed from the gravel.

Parameters are as follows
pH - 7.2
Temp - 24c
Nitrite - 0
Ammonia - 0

The tank is well planted and a small airstone for agitation. Feeding is normally every second day.

I have ordered prazipro hopefully it turns up tomorrow. Any ideas of what could be the cause would be helpful. Also added a pic of him.

 

[the loach]

Sorry to say, but he's not going to make it and the Prazipro won't do anything.... you could try something anti bacterial but it might be poor stock, genetical or a virus (or all of the above) it's impossible to tell, in which cases an antibiotic won't be effective either. Once a fish is floating or lying like this on the gravel it's too late.