Migration to Concrete Fish Tanks

After a 1 month test of using polythene tanks with wooden supports which seemed lower cost at the beginning, we have decided to move to concrete tanks that surprisingly have a similar capital cost envelope with the benefit of longer life span.

The design of the tanks is:

  1. Bricks laid in header bonds (with the small face of the brick laid at the side)
  2. An reinforcing column every 6 feet on the short side and 10 feet on the longer side to provide additional strength
  3. A finer mix of the mortar used for laying the bricks (3 wheelbarrows of sand per 50kg bag of cement)
  4. Bottom was a concrete slab with a slight incline of the floor towards the outlet to help with cleaning
  5. The finishing includes an additional mix of water proof cement in a ratio of 1kg of waterproof cement per 50kg of regular cement.
  6. The outlet is placed 1 foot from the bottom so that not all the water drains out of the tank in case of accidental leakage

As always a picture is worth a thousand words:

Tank frame with header brick layout

Tank frame with header brick layout

Finished tank longitudinal view showing location of the outlet

Finished tank longitudinal view showing location of the outlet

Finished tank longitudinal view 2

Finished tank longitudinal view 2

Inside view of the tank

Inside view of the tank

Lengthwise view of the tank

Lengthwise view of the tank

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