Corporate Fish Farm Nigeria

How much does it cost to buy plastic fish tanks? Mention the plastic fish tank sizes and the maximum number of fishes each tank can contain. 
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Give the name and address of plastic fish tank manufacturers you know. 
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Mention the plank materials needed to construct wooden fish tanks and give their indicative prices in order to reduce the chances of agreeing to inflated quotation by carpenters 
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Mention the plumbing materials needed to construct fish ponds (and give their indicative prices also) in order to reduce the chances of agreeing to inflated quotation by plumbers. 
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Give a step by step guide of how to construct a solid concrete fish pond that will last long and not leak or collapse. 
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Is it necessary to build a roof over concrete, plastic or wooden fish ponds? If Yes, state why? 
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Why does one fertilize concrete ponds and how is it done? 
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