> 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. I had originally read it there, and I don't have my Baench atlas here but I think it lists it under the heading for the blue gourami and not under the pest section (not sure though, I stick my nose in alot of fish books)