Will this product keep flees off of gerbils?

What will help is to put them in a CLEAN box and dust them with Flee powder, Then as the powder is working to kill off the fleas , If you can not get a whole new Cage / Tank,,Take the cage and empty EVERYTHING, If it comes apart Take it apart Throw all wood blocks etc into the trash >>but use a neighbors trashcan down the street,Them wash the cage in a Flea shampoo, Mix it very strong for cleaning the cage etc, but DO NOT DIP Gerbils, Then find a strong Hook, ..Chain ...rope and Hang the cage from the beams so that the fleas can't get rite back into the cage . While the animals are all out of the garage, Set Off a Flea Bomb that kills fleas and their eggs, Then after you have done all this, KEEP THE CAGE CLEAN!!! Those poor lil gerbils, they are so small that having flea would be like you living with blood sucking cockroaches under your clothing 24-7 >365