It's a shame they didn't at least include thoroughly rinsed carbon into the study. You would think they would have since it say the original hypothesis was carbon dust was the culprit. This may be a case of follow the directions!

Directions for Use
Please rinse ROWA carbon with water before use to remove carbon dust.
Directions

Use approximately 1/2 cup of HydroCarbon2 per 50 gallons. Pour the required quantity into a polyester or nylon filter media bag. Rinse the carbon by immersing the closed filter media bag into a container of tap water. The porous carbon sizzles as it becomes hydrated. Shake the bag underwater. Lift and immerse underwater repeatedly in order to wash out most of the carbon fines.
Black Diamond Activated Carbon

Directions:
Place in media bag or media basket and rinse thoroughly in cold water to eliminate dust.
Replace immediately when effectiveness diminishes, usually indicated by smells or discoloration of aquarium water. Otherwise, replace every 4-6 weeks.
Premium Granulated Carbon
Rinse. Pour the correct amount of carbon into a mesh filter media bag and close securely. Rinse the carbon with RO/DI (reverse osmosis/deionized) water or water from the tank to remove the dust created from storage and transport.
Black Magic Activated Filter Carbon
Instructions: Before using, rinse thoroughly under running water to remove fine particles caused by shipping vibration. Place Carbon in one of the following locations: Black Magic Power Pocket Replacement Filter Cartridge, Bubble-Up Under Gravel or Corner Filter, on a outside filter (follow manufacturer's directions), or in a nylon filter bag on top of a gravel bed.
Lifegard Aquatics Pelletized Activated Carbon

Directions
Place in media bag or media basket and rinse thoroughly in cold water to eliminate dust particles.