Aquaculture guide

Floating fish cages — price and sizing with clear inputs

What affects the price of a floating cage: diameter, HDPE rings, nets, buoyancy, species, biomass and maintenance access.

HDPE floating cages for a fish farm

5 min read

For price estimation, diameter is the first reference point. HDPE structure, net, depth, biomass, mooring, access, feeding and lake or reservoir conditions define the right configuration.

Quick specification table

Existing Weldplast dataDiameters 10–25 m, net depths 5–15 m, 10–100 tonnes of fishPublic references from the aquaculture page, not standard sizes; each fish cage is made to order, in any dimension required by the farm.
Public projectsBacău: 32 cages 4×4 m and 26 cages 6×6 m; Piatra Neamț: 10 m diametersPublished portfolio examples; each farm receives its own configured quote.
Price factorsDiameter, HDPE rings, nets, buoyancy, mooring, walkwaysConcrete prices are confirmed through a quote, per configuration.
Biology inputsSpecies, size, density, oxygen, currents, feedingWith these inputs, sizing becomes a recommendation tailored to the farm.

What drives price

Diameter and number of HDPE rings set the base structure, but net, depth, UV treatment, railings, walkways and anchoring can change the quote substantially.

Price ranges are confirmed through a current quote, based on the farm's configuration; this guide publishes no generic values.

Sizing starts from the fish

Species, stocking size, target biomass, available oxygen, currents and handling frequency decide usable volume and net type.

For an existing farm, send the site plan, water depth and access conditions for maintenance and harvesting.

Quote checklist

  1. 1Species and target biomass.
  2. 2Diameter or any dimensions desired by the project; there are no fixed standard sizes.
  3. 3Water depth and net depth.
  4. 4Wind, current, ice and variable-level conditions.
  5. 5Need for walkways, railings, feeders or aeration.
  6. 6Note the budget or target price and request an updated quote for the chosen configuration.

Short FAQ

Why can two cages with the same diameter cost differently?

Net, depth, buoyancy, accessories, mooring and operating conditions may differ.

Can I use 10–100 tonnes as a promise?

The 10–100 tonne capacity is an indicative public Weldplast reference. For a quote, the project is sized by species, density and water quality.

Is there a price per metre?

Price is confirmed after configuration: diameter, net, buoyancy, mooring and accessories. Send the farm data for an updated quote.

Useful links

Floating cages pageBacău fish farm project

Have species and target biomass?

Send farm data, water depth and desired accessories for a floating-cage configuration.

Request Quote

Sources and limits

  • Existing Weldplast content: the aquaculture page mentions HDPE floating cages, UV resistance, diameters 10–25 m, net depths 5–15 m and 10–100 tonne capacity.
  • Public Weldplast projects: Bacău, Piatra Neamț, Buhuși, Nucet, Hungary and Slatina.
  • Prices, stocking densities and production guarantees are confirmed per project, together with the farm designer.
Call NowWhatsApp