Information Documents

Stocking Policy
DWA Proposed Minimum Requirements
DEA Permit
De Rust Business Profile
Cost benefit of using grass carp
Kostevoordeel van die gebruik van graskarp
Waterbestuursprogram vir opgaardamme
Water management program for irrigation dams

Managing invasive aquatic weeds with sterile grass carp

We are specialists in the breeding and application of sterile Chinese grass carp (Ctenopharyngodon idella) for the control of aquatic weeds in dams and waterways. With 15 years of experience in the application of sterile grass carp, we are involved in numerous projects and estate developments. We consult clients on a wide range of practical application models and the development of dams into angling destinations for the eco-tourism market.

Each Grass Carp is micro – magnetically coded and each shipment of fish is accompanied by the necessary sterility certification and permits as required by the various Provincial Authorities.

De Rust is the leading authority on Grass Carp in Southern Africa.
Please feel free to contact De Rust for any further information.

We trust that you will be able to make use of our professional services.

Grass carp is an exotic fish species and should be utilized with care. Furthermore grass carp should not be confused with other carp species which occur in South Africa. Following is the differences between grass carp and other carp species.

Photos and information obtained from Paul Skelton: A Complete Guide to Fresh Water Fish in Southern Africa, and The South African Institute for Aquatic Biodiversity: All rights reserved. Anyone downloading the pictures for commercial use need to obtain permission to do so from the South African Institute for Aquatic Biodiversity.

Grass carp
Ctenopharyngodon Idella
Silver Carp
Hypophthalmichthys moltitrix
Common Carp
Cyprinus carpio


short back fin in middle of body
Absence of feelers
Close to snout in middle of head
Medium sized.


Flat sided
short back fin
Angled downwards
Situated low on head.

Very small
Long backfin & sharp point in front.
Protruding with feelers
High on head
Medium sized
some carp do not have scales
or have very little scales. [Mirror Carp]

Current prices (excluding VAT) for certified sterile, disease free Grass Carp (subject to change without prior notification) are:

View our pricelist here


Afrikaans Order Form
English Order Form (pdf)

Right-Click on the above links and
choose "save target as". Download takes approximately 30 seconds or
complete a
n online order form.

Quotes will be given for bigger orders
Prices exclude consultations, permit
applications, packaging, transport and VAT

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