New 10 gallon tank won't cycle

The molly is all that is left I had two molly's two cory's and a dozen white clouds. (overstocked!)
The molly is extremly stressed and has not been fed for three days (won't eat) and I am only offering one or two flakes to see if he will eat. I used a vacum to remove the high amount of waste from the gravel (petsmart brand).
At this point I assumed he would not make it and when he dies I was going to try a fishless cylce with ammonia. Should I tear the tank down first?
The air pump was added as a guess form the LFS. It appears to me that between the pump and the air quite a current is produced and the fish seem to be swept around the tank!

Thanks everyone for your input.
 
I wouldn't tear down the tank, I'd just keep the current bacteria going by adding some ammonia daily, how much is a really problem to solve however.

I'd suggest maybe taking a one gallon jug and adding 2 ml of ammonia to see how that tests out with your test kit, the multiply from there for your true tank volume (that is a 10 gallon tank holds about 7.5 gallons, you need to measure actual water column and calculate it)
 
The Molly has come around after several days of 30% water changes. So I will try again on the cycling. Thanks all for your input.
 
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