In a message dated 5/1/98 5:20:53 AM, CYKong@aol.com wrote: << Funny thing is that I tried gouramis only because the Baensch Atlas (vol. i) suggested it, but when I went back and checked later - I realized that the BA was talking about gouramis (which they labelled as trichogaster sumatranus in the pest discussion) eating planaria, not hydra. "Hydra, leeches and diskworms" was only a heading. Oops... all's well that ends well, I guess. >> In my 1953 copy of EXOTIC AQUARIUM FISHES by the venerable William T. Innes it specifically recommends the Blue or Three-Spot qouramies as hydra-eaters, and offers the Pearl Gouramie as second choice. Jeff