Page 67 - fish_farms_curriculum

6.7. Balance Tank/Pool

In the geothermal system, there should be a balance pool with water pump for the water

circulation and if necessary biological filter which the water of the fish tanks is collected and
the balance of the system is ensured. The size of this balance pool can be 5-10% of the total

water volume in the system.

Daily fresh water entry into the system and discharge of the water in the system should be
made through this balance pool. Covering the balance pool with an opaque canopy will reduce

algae growth in the system. Algae explosion in the system may cause nutrient deficiency by

these night-breathing vegetative organisms consuming the dissolved oxygen in the water,
negatively affecting the water quality, and by sharing the nutrients of the vegetables in the

system. Therefore, algae control in the system should first be performed by shading the
balance pool (and fish tanks).

The balance pool can be made from plastic tanks or it can be made in the form of a concrete

pool. The water level in the system should be adjusted and balance pool should be located in
the most suitable place for the system, and its height and depth should be adjusted according

to the water level of the system.

6.8. Piping

Pipes and fittings of different diameters made of polyethylene (PE), polyvinyl chloride (PVC)

or polypropylene (PPRC) materials are used in the installations of water and air lines. The

usage areas and usage patterns of these pipes and fittings produced from different materials
are also different.

Polyethylene materials are pipes that can be found in coils up to 100 meters in desired

thickness, and are mostly used to transport water to long distances in the geothermal system.
Connecting these pipes or fittings to each other is made with threaded and compression

materials called couplings. It is relatively affordable.

Polyvinyl chloride materials are mostly available in desired thickness and 6 meters in length
(1 size). It is the most suitable material for the smooth extension of the pipeline at the water

inlet and outlet to the tanks. These pipes, which can be resistant to different pressure levels

with wall thicknesses, can be used by passing through muffs and sticking them with a special
adhesive, or by compressing threaded materials.

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