Repashy Superfly — Fruit Fly Culture Medium

Repashy Superfly is a complete fruit fly culture medium — just add water, add flies, and culture. For anyone breeding Drosophila as feeders, it replaces the messy DIY route of potato flakes, brewer's yeast, vinegar and mould inhibitors with a single balanced powder that produces consistently high yields, culture after culture.

Why a Premium Medium Matters

A fruit fly culture is only as nutritious as what the flies grow on. Flies raised on thin, cheap media are thin, cheap feeders. Superfly is formulated so the flies themselves carry strong nutritional value — effectively gut-loading your feeders from the larval stage onwards — and includes mould inhibitors and a balanced fermentation profile that keeps cultures productive for weeks rather than crashing early or souring.

How to Use

Mix the powder with water (roughly 1 part medium to 2 parts water) in the bottom of a culture cup to a thick paste — no cooking required. Add a pinch of yeast if desired, a sprinkle of excelsior or coffee filter for climbing surface, seed with 30–50 flies, and keep at room temperature. Expect the first big boom of new flies in around two weeks with flightless melanogaster, slightly longer for hydei.

Who Cultures Fruit Flies?

Dart frog keepers above all — fruit flies are the staple dart frog food, fed daily and dusted with a supplement like Calcium Plus before feeding. That community overlaps almost completely with ours: dart frog vivariums run on bioactive principles with springtails and dwarf isopods doing double duty as cleanup crew and supplementary live food. Beyond frogs, fly cultures feed mantids, juvenile chameleons, day geckos, fish fry and spiderlings.

Superfly and Springtail Culturing

Worth knowing: spent Superfly cultures don't have to be binned. Once fly production slows, the remaining medium is excellent food for springtail cultures — many keepers seed exhausted fly cups with springtails and get a second harvest from the same medium. If you culture springtails on charcoal or clay, brewer's yeast remains the everyday staple, with Superfly leftovers as a bonus.

Sizes and Storage

Store the dry powder sealed in a cool, dry place — many keepers refrigerate opened packs. One larger pack mixes dozens of cultures, making cost-per-culture far lower than it first appears.

Ideal for: dart frog keepers running weekly fly cultures; mantis and jumping spider keepers; anyone feeding fish fry or hatchling reptiles; bioactive keepers already culturing springtails.

Not ideal for: feeding directly to isopods as a food — for detritivore colonies, Morning Wood and Bug Burger are the purpose-built options.