I have just found my betta fish on my kitchen floor, he has fell from the worktop, I really don't know how it's happened, I am in shock, there is the tiniest gap on the lid on his tank so he must have got through it, I immediately put him back in his tank and he was very stunned but he's swimming around now still looking a bit worse for wear but swimming, is he likely to survive and is there anything I can do for him, I am so upset