Tropical Marine Centre
fishkeeping books at tmc-publishing.com

A wide range of fishkeeping books available from TMC Publishing

Commercial Products

Depuration Systems

TMC Depuration Unit

tmc manchesterThis unit is based on the Seafish standard design for a small-scale shallow tank depuration system and was designed for the purification and holding of molluscs, based on trials at a number of commercial purification centres around the UK.

The unit consists of a robust, food grade container, with it's double walled foam filled (HDPE) construction offering excellent insulative properties. The container also boasts a drainage port with sump in each of the corners, allowing complete and easy draining. This, combined with the smooth internal corners, means that the container is very low maintenance and easy to clean.

The unit can be filled via the UV steriliser using the multi-stage hosetail. The Eheim pump is 100% waterproof and can supply a water flow rate of up to 30 litres per minute. The water flow is easily adjusted using a ball valve and the flow meter. Conventional purification units utilise a single UV steriliser, whereas the TMC unit incorporates a twin 25W splashproof unit. This double pass steriliser guarantees an effective dose rate. The design of the lamp end caps allows the user to see at a glance if both lamps are still operating.

The container can hold 6 stackable baskets, with open mesh sides and bottoms allowing excellent water flow characteristics (not supplied).

Species Recommended Bio-Mass per Basket Total Stocking Density
Mussels 15 kg 90 kg
Pacific Oysters 125 Oysters 750 Oysters
Native Oysters 125 Oysters 750 Oysters
Clams 21 kg 126 kg
Cockles 15 kg 30 kg

Taken from Seafish Standard Design Purification Systems (1995) ref: 95/34/FT-V1, Figures based on using the Allibert 41042 container.

The TMC Depuration Unit has been designed for small-scale depuration. However, for larger scale requirements we can design bespole systems. Please contact us for further details.

Depuration Unit Technical Details

Lobster Holding Tank

Teco "VR" refrigerated tanks have been designed for the holding of live fish products, in particular crayfish, lobster and other shellfish. They are made from one-piece fibreglass and are insulated with 40mm of cellular polyurethane in order to reduce thermal and energy dispersion.

The use of revolutionary modular filters makes maintenance very easy as cleaning can be carried out without having to empty the tank or remove livestock.

The water is circulated via the mechanical/biological filters by a high delivery magnetic drag circulation pump, ensuring that the biological cycle is correctly maintained, reducing organic pollutants in the tank. Large variations in biomass should be avoided in order to maintain the bacteria associated with the filter.

Lobster Tank Technical Details

Maintenance Tips

Although very simple to use and maintain, shellfish holding systems are essentially like any other aquarium system and therefore good husbandry improves the quality of the product enormously:

Ensure the water is the correct salinity and other parameters such as pH and temperature are satisfactory before introducing any livestock.

When commissioning a new holding system, stock it gradually over the course of a few days to allow the biological filters to mature.

Ensure that the livestock is cleaned before introducing to the system and regularly remove any broken shell, faeces or dead animals to keep the system clean and avoid bad odours.

Keep a regular check and record of temperature, salinity, pH, ammonia and nitrite levels to ensure that the water quality is as high as possible. Click here for our range of test kits.

As the animals should only be displayed on a temporary basis they do not need to be fed.