118ml.

DESCRIPTION
Wardley® ESSENTIALS™ Bullseye™ 7.0 Water Treatment is an aquarium pH regulator which automatically adjusts and buffers aquarium water to a neutral environment (pH 7.0). Depending on aquarium size and setup, Wardley® ESSENTIALS™ Bullseye™ 7.0 Water Treatment can be effective for up to 2 months.