You searched for: “phretophiles”
phretophile (s) (noun), phretophiles (pl)
An organism that thrives in water tanks: Algae is a phretophile that can grow in a tank that holds the water used to flush a toilet.
This entry is located in the following units: philo-, phil-, -phile, -philia, -philic, -philous, -phily, -philiac, -philist, -philism (page 56) phret-, phreto- + (page 1)