The Ghost Tank is glass tank invented by Professor Dweeb to hold a ghost for analysis without it phasing through and escaping.
On one occasion, Professor Dweeb kidnapped Slimer and deposited him into the Ghost Tank. After revealing his scheme, Dweeb connected the tank to his Brain Drain Machine and scanned his memories. Eventually, Slimer overloaded the device and imploded the Dweeb Residence. When the smoke cleared, the tank was shattered and Slimer was free to leave.
- "Deja Boo"