If you do all these things, I am sure he will live if there is ANY chance he will live, then this should do it. Sorry, if the items are not available to you. Just omit or improvise on the basic idea. We will presume that something is wrong with this fish. We will assume that, as with most cases of fish "oopsie", the cause is in the water. So what we're going to do is get your fish as gently as possible (but also as quickly) into some "good" water...
You with me?
Okay, first choice -- drive to a pet shop where the tanks are nice and the fish all look healthy and just ask them to sell you some water from a "healthy" tank -- this will mean water that is clean but that has has all the heavy metals and chlorine removed by filtration or more likely organic processes. If they look at you strange at the pet shop (it's actuallly quite an odd request) just smile and act like you are not insane. I have done this a lot.
Pay for the water (nothing crazy) if you have to.
Next thing is you want to achieve as swift and stress-free transfer of little Jonjon as possible. The two parameters you need to concern yourszelf with are temperature and...let's call "water chemistry" on thing, though it includes many sub-parameters.
Thankfully, it possible to acclimatize for both temperature and chemistry simultaneously. Here is where you will have to apply some mechanical ingenuity based on available items. But, basically what you will do is you will isolate Jonjon in a small amount of his original water, being careful not to agitate him too much during capture. The you want to rig some sort of drip mechanism, so that the new water fills the small container..slowly not moe than one drip per second -- usually an hour is recommended for this process, but go ahead and speed things along a bit to like 30-45 mins. At the same time, the small container has been sitting in the *destination* which is filled with new water. Be very careful not to allow old water into the new water. Last thing is, net the fish out of the small container and release into the new water tank. Cross your fingers, if he lives, he lives.
If you are unable to get enough or any clean water from an established tank, you can substitute bottled water (verify no heavy metals) and add to that the following exceptional aquarium product...
http://www.petsolutions.com/Images/200/48031161.jpg
Good luck --
