HOW TO FORMULATE FEED FOR AQUARIUM FISHES

Sample Formulations and
Recipes There are numerous recipes for
making fish feeds, and it is beyond
the scope of this publication to
present them all. Presented here
are examples of a purified, a semi-
purified, and three practical diets that can easily be adapted to feed a
wide variety of fishes. Purified and semi-purified diets are
used primarily in experimental
formulations to study the effects of nutrient, such as the amount or
type of protein, may have on the
health and growth of fish. One simple formulation, which is
used traditionally to feed
ornamental fish in ponds, consists
of a mixture of 30% ground and
processed oats or wheat and 50%
of fish meal or pellets from a commercial manufacturer. By
weight, approximately 2-3% of fish
oil, and a 0.3% vitamin and a 1%
mineral premix are added to the
mixture. This mixture is blended
with water and can be formed into dough balls of different sizes. Two sample
fish feed recipes. These are: . A semi-purified diet, developed to determine the optimum protein
level required by young
ornamental African cichlid fish
(Royes, unpublished Dissertation).
This diet also can be used as a basis
for feeding other types of ornamental fish in the laboratory.
The cichlid feed recipe was derived
principally from salmonid
formulations and uses casein as the
purified protein source. The
ingredients in the recipe are listed under major nutrient categories
such as proteins, carbohydrates,
lipids, vitamins, and minerals.
Pigments are added to enhance the
coloration in these ornamental fish. . A gelatin-based diet, developed for difficult to feed fishes by the
National Aquarium in Baltimore
(from Francis-Floyd and Reed,
1994). In this diet, gelatin is the
primary binder. This recipe can be
modified and supplemented with a variety of ingredients.
Supplemental or replacement
ing redients are presented. Gelatin-
based diets are popular in the
aquarium fish industry and useful
for preparing medicated feeds at home Ingredients and their proportions (percent of dry weight) in five diet formulations. These formulations can be modified to feed fish in the laboratory or small farm.
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