Using the bombs is a huge pain in the you know what! First of all, it's not just your tank you have to worry about. All you cabinets that contains dishes must be completely sealed with tape, your bathroom wherever you keep your tooth brush/toothpaste must be sealed, your faucets need to be wrapped and sealed at the spicket, medicine cabinets, fridge water and ice dispenser, pantry doors or any other place you keep food, pillows, door knobs (unless you plan and cleaning them off afterwards), and any thing else you ingest, or could some how cross contaminate to the eyes nose and mouth.
IMO, I would treat with the powder made for carpets (you may have to apply a second time). Then spray your yard (because that's probably the main infestation culprit). They also carry a barrier spray that you use around doors and windows. Make sure to continue to treat your yard every 3-6 months as directed on the product you choose. Otherwise, the fleas from neighbors will multiply to your home again.
I have 2 large dogs, one of which I rescued from the pound. My pound puppy infested our home and yard. This is the route I chose and it does work and it's less of a headache. My brother just went thru the same thing 2 weeks ago. He wanted to bomb their house until I stopped him and pointed him in this direction. I told him what to buy and how to execute and now they are flea free.
If you still choose to bomb, I would suggest hiring a professional. Even if you bomb, you will still have to treat your yard and home entrances with a barrier to keep it from happening again in a few months.
I hope this helped. Feel free to ask any questions.
Mommy of 3 babies, 2 fur babies and 12 gilled babies