204

 
3/8/2003 - nghia - Tom cua toi duoc 19 ngay, nhung vao nhung luc tu 8 gio den 11 gio trua, mot so tom thuong co dau hieu dang boi dot nhien thang than len cach mat nuoc khoang 20cm;(giong nhu tom noi dau);(dan dia phuong goi la boi du), vay xin hoi anh dau hieu nhu vay la co sao khong? (nguoi nuoi dia phuong noi la khong co van de gi!) pH (sang:8.3, chieu 8.4) do man:22%o; kiem 120; khong co NH3; tao phat trien binh thuong.

 
- Hien tuong tom bung thang than len khoi mat nuoc co nhieu nguyen nhan nhu: do bien dong moi truong nhat la ve thoi tiet, nang nong, gap ca du (ca loc, ca bong cat...), tom chay do soc gap nhau, hoac bi cac vi sinh vat ky sinh tan cong vao phu bo, vao mang...nen kho chiu bung thang len hoac chay...

- Trong truong hop ao cua anh, cac thong so ve moi truong on dinh, 8h-11h sang thuong la gio khong bi thieu Oxy. Tuy nhien cung luu y den truong hop bi vi sinh vat ky sinh tan cong, cung nen de phong theo doi, neu thay thuong xuyen bung nen xu ly bang cac loai thuoc sat khuan nhu Virkon, Iodin, Povidin...