delusion of negation (nihilistic delusion) a depressive delusion that the self, part of the self, part of the body, other persons, or the whole world has ceased to exist. paranoid d's an older term for delusion of grandeur and delusion of persecution; its use is discouraged. delusion of persecution a delusion that one is being attacked, harassed, cheated, persecuted, or conspired against. It is one of the subtypes of delusional disorder.
Soft Green Algae. The main food of Otocinclus is algae. They will eat the soft green algae that grows on the surfaces of the tank and its contents. This surfaces include the inside of the tank walls, gravel, decorations, and plants. This soft algae isn't to be confused with green spot algae that you can barely get off with a razor blade.
Chinese Algae Eater. Another large fish, growing up to 11 inches in length, the Chinese Algae Eater is a finicky eater when it comes to algae. If there are any clumps of algae, or algae that is attached to rocks, plants, or sides of the pond, then this fish will eat it.However, because of their size, they can be aggressive towards other fish species.Testing different pond fish to find out which ones they coincide nicely with will help a great deal.y successfully choosing the right pond fish you can easily control the amount of algae that grows in your backyard pond. Algae is a part of any type of pond. It is a green film that is the result of a collection of microscopic plants that contain chlorophyll.