Improve the high temperature stability of concrete?

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Which is better in plastic pipes or steel pipes in fish projects What is their effect on fish?

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What are the reasons that led to the failure of the closed system used in fish breeding in most Arab and foreign countries?

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Who has the book of animal production?

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Nabeel Hameed Al-Saati

Temperature and pH have an important effect on fish especially temperature. I think the following link is useful:-

http://www.tandfonline.com/doi/full/10.1080/09712119.2011.620269

Best regards.

Kundan Meshram

pl see this.

http://www.fondriest.com/environmental-measurements/parameters/water-quality/water-temperature/

Doha M Al Saffar

Dear Salam

I don't understand how these questions are relevant ( fish, and stability of concrete).!!!

REGARDS