Amoebae in a swimming pool

Sterile microscopic slides were placed on the bottom in the

deepest part (3.5 meters) of a swimming pool treated with chlorine.

One week later slides were carefully taken out and (still wet)

fixed in sublimate alcohol. The community of microorganisms

attached in the biological film consisted mainly of bacteria,

amoebae, flagellates, infusorians, yeasts and microscopic

forms of worms. Cytological diversity of amoebae is documented

in this album. Slides were stained by Masson´s trichrome

or Giemsa. Sizes of amoebae ranged from <5 microns

to >100 microns, detailed species determination was impossible.