Mr. Bubbles seems to be in good spirits to survive the horrible accident.... my guess is that he did rupture his eye. He is not eating but seems quite content in his new home.
I ended up spending 75 dollars (more expensive to buy here than in the US) but got him a new home 3 litre capacity (temporary fish tank while he recovers and I save up to buy him a bigger one), aquarium salt, aquarium heater (up to 5.5 gallons), API stress coat and blood worms to tempt him to eat (never tried them before).
I mixed one gallon of bottled drinking water, 1 ml of stress coat and a teaspoon of aquarium salt. Will change his water tomorrow and on Wednesday I am going for a few days and asked my sister to look after him.
Mr. Bubbles is used to my touch, every time I change his water I do it with my bare hand very gently (obviously super clean hand) and he doesn't get stressed that way, he is used to that and terrified of the net.
Any suggestions on how to make the water changes less stressful for Mr. Bubbles and my sister?