Tangs and rabbitfish are built to graze. Their digestive systems are long, their gut bacteria are adapted to breaking down plant material, and their bodies are tuned to extract colour pigments and immune support from algae that high-protein carnivore foods simply do not contain in meaningful quantities. Feed them the wrong food consistently enough and the signs are quiet but cumulative: colour that fades gradually, a fish that looks maintained rather than thriving, susceptibility to Ich that arrives when condition is marginal.

The problem is not always obvious at the point of purchase. A tang put onto a general marine flake will eat, will swim, will appear to be doing fine. The gap between fine and genuinely healthy is what the right diet closes over weeks and months of consistent correct feeding.

Reefphyto Vegetable Flake is a complete daily flake food formulated specifically for herbivorous fish, with a composition led by cereals, vegetable protein extracts, derivatives of vegetable origin, and algae, alongside fish and fish derivatives, yeasts, oils and fats, and minerals. Crude protein is 39%, fat 8%, reflecting the lower animal protein and higher carbohydrate balance that herbivores are built to process. A full vitamin pack including A, D3, E, C, and the full B complex is included. Feed once or twice daily, offering only what your fish will consume in two minutes.

In a tang or rabbitfish fed correctly over time, the difference is visible in the depth and saturation of the colour, the energy of the swimming, and the way the fish holds condition through the minor stresses that are part of any reef tank. A well-nourished herbivore looks settled. It grazes with intention. It does not pace or fade.

Reefphyto has been supplying marine nutrition from Wales since 2008. We source, pack, and label this flake ourselves. For advice on building a complete herbivore feeding programme alongside live foods or algae pellets, Darren is available directly at [email protected] or on 01267 611533.

Give your herbivores a complete food that is actually built for them, and let the difference show.

Herbivorous marine fish are among the most commonly underfed fish in the reef hobby, not because their keepers are negligent, but because the default foods available in most fish shops are built for a different type of fish. The standard marine flake is formulated around fish meal protein at 45-50% or higher, which suits the metabolic needs of clownfish, chromis, and other carnivore-leaning species very well. For a tang or rabbitfish, that same food delivers the wrong nutritional balance consistently, and the consequences accumulate slowly enough to be easy to miss.

The fish keeps eating. It swims. Water parameters look fine. But over weeks, the colour that should be vivid becomes adequate. The fish becomes more reactive to stress. Minor health challenges that a well-conditioned herbivore would shrug off become problems. None of this happens dramatically. It happens quietly, in the gap between what the fish is receiving and what its biology was built to use.

Reefphyto Vegetable Flake is designed to close that gap with a daily complete food built specifically for herbivorous marine and tropical fish.

A Complete Food Built Around Herbivore Nutrition

The distinction that matters most in this product is the composition hierarchy. Where carnivore and omnivore flakes lead with fish meal protein, Reefphyto Vegetable Flake leads with cereals and vegetable protein extracts, with algae, derivatives of vegetable origin, and yeasts alongside fish and fish derivatives, oils and fats, and minerals. This reflects how a herbivore's digestive system is actually structured: longer gut, adapted gut flora, and a metabolic pathway tuned to processing plant carbohydrates and extracting value from algae-sourced pigments.

The resulting analytical profile is 39% crude protein, 8% fat, 1% fibre, and 4.7% ash. That lower protein percentage compared to carnivore flakes is not a quality deficit. It is the correct formulation for a fish that is not built to process high animal protein at every meal.

The full vitamin pack covers A, D3, E, and C alongside B1, B2, B6, and B12, supported by trace elements including copper sulphate, manganous oxide, zinc oxide, and calcium iodate. This is a nutritionally complete daily food, not a supplement.

Which Fish Is This For?

Reefphyto Vegetable Flake is suited to tangs and surgeonfish of all species, rabbitfish, marine angelfish, herbivorous blennies such as lawnmower blennies, and any omnivorous reef community fish that would benefit from a vegetable-forward diet component. It is also appropriate for freshwater herbivores including livebearers, rainbowfish, and many cichlids.

It is not the right primary food for strongly carnivorous marines such as lionfish, groupers, hawkfish, or dottybacks, who require a higher animal protein intake. For those species, the Reefphyto Squid Flake or Brine Shrimp Flake supplement range is a better nutritional fit.

How Vegetable Flake Differs from the Soft Algae Pellets

Both products are formulated for herbivorous marine fish and sit alongside each other naturally in a complete herbivore feeding programme. The distinction is format and application.

Reefphyto Premium Soft Algae Pellets are a 1mm soft sinking pellet incorporating five algae species, auto-feeder compatible, and designed to be pressed onto glass for a natural grazing presentation. They are particularly well suited to tangs that graze flat surfaces and to keepers using automatic feeders.

Vegetable Flake is a surface-floating flake that suits fish which prefer to feed at or near the surface, works in tanks without auto-feeders, and crumbles down easily for smaller fish. For a mixed herbivore community, alternating between the two formats across the week gives fish variety in both nutrition and feeding behaviour.

How Vegetable Flake Fits Alongside Live Marine Nutrition

For reef keepers already running live copepods or zooplankton, Vegetable Flake provides the herbivore-specific dietary foundation that live crustacean foods do not cover. Live copepods are an outstanding food for carnivorous and omnivorous fish, but they are not a substitute for an algae-rich diet in a dedicated herbivore. The two approaches complement each other: Vegetable Flake as the daily staple for tangs and rabbitfish, live zooplankton as the broader nutritional enrichment for the reef community as a whole.

Feeding Guide

Feed once or twice daily. Offer only as much as your fish will consume within two minutes. Remove any uneaten flake promptly to protect water quality. Store in a cool, dry place away from direct light and close the container after each use.

Frequently Asked Questions

Is this a complete food or a supplement? It is a complete food. Reefphyto Vegetable Flake can be used as the primary daily diet for herbivorous fish without requiring a separate staple alongside it.

Is it suitable for marine tanks with corals and invertebrates? Yes. Feed normal quantities sparingly and remove uneaten food promptly.

Why is the protein lower than other flakes in the range? Because the product is formulated specifically for herbivores, whose digestive systems are built around plant carbohydrates rather than high animal protein. The 39% protein level reflects the correct nutritional balance for tangs, rabbitfish, and angelfish, not a quality compromise.

Can I use this alongside the Reefphyto Premium Soft Algae Pellets? Yes, and we recommend it. Alternating flake and pellet formats across the week gives herbivores dietary variety and different feeding behaviours, both of which support long-term condition.