Focused Hacker

From BioShock Wiki

Focused Hacker is an engineering tonic which removes up to 2 overload tiles while the user is hacking. It may be used in conjunction with Focused Hacker 2.

Game Caption

Another favorite in the HackSmart line of gene tonics, Focused Hacker defuses overload traps in secure systems. Fewer fried circuits guaranteed or your money back!

Location

In the entrance to Fontaine Fisheries in Neptune's Bounty. Frozen in ice near the Pneumo Tube.