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Concrete tanks are prepared by filling up with filtered seawater provided with aeration and pure cultures of diatom added to preserve water in good condition and make it less transparent. Ideal stocking density of the larvae is about 50/cubic meter of water. It is advisable to use substrates to increase surface area in the nursery tank, because postlarvae have a habit of clinging to the wall and tank bottom. Polyethylene nettings can be used and being synthetic, they do not decompose in water and can last longer without deterioration. |
