推荐回答(4个)
TDS是总溶解固体(英文:Total dissolved solids,缩写TDS),又称溶解性固体总量,测量单位为毫克/升(mg/L),它表明1升水中溶有多少毫克溶解性固体。TDS值越高,表示水中含有的溶解物越多。 总溶解固体指水中全部溶质的总量,包括无机物和有机物两者的含量。一般可用电导率值大概了解溶液中的盐份,一般情况下,电导率越高,盐份越高,TDS越高。
养虾要求的tds不应过高(不超过300),但水产养殖中一般用ph值或者硬度来测算。
不必关心TDS值。只要硬度,酸碱度,NO2等等指标正常。TDS就不会有影响。
我们一般认为是不耐热但是相对耐寒,温度影响其生长速度十分明显。一般不建议水温长期超过26度,26度已经是警戒温度了,长期超过以上温度对水晶虾也许是致命的了。至于水晶虾能够忍受的低温这个本人没有尝试过,曾经有资料说接近结冰的水也有水晶虾生存,不过我还是建议不要低于18度很久,维持在20-24之内我想都是没有大问题的。
【PH】PH对虾影响很大,一般控制在5.5-7.0,更低的PH可能导致水晶虾慢性中毒以及壳硬化困难,更高的PH对虾的生存威胁也很大。超过7.5的PH偶尔有报告正常生存,不过长期下来虾的状态一般不怎么乐观
【硬度】此处提出的是硬度,但是实际我们要讲的是钙镁硬度,就是所谓我们常说【GH】
(KH是碳酸盐硬度,对调控PH有影响,同样也在调控钙镁的溶解度,但是本处不做深入解释。)
GH的争议其实还是比较大的,所以我在这里也就给出一个常见的【练手级水晶虾】适合的GH 2-4
GH越大,水晶虾颜色越浓,脱壳越难,周期越慢,危险越大。
GH越低,水晶虾颜色越淡,脱壳容易但是也容易脱壳不完全,周期变快,生长变快,繁殖变快。
【其他常见的指标】TDS-经常有人提起TDS,实际上就是可溶性固体总量,也就是说水里溶解了多少盐类。并不是所有盐类虾都用得上,特别是自来水养虾时候TDS最不具有参考价值。同时也告诫各位新手朋友【如果要用自来水养虾,如果出现疑问和困难去贴吧提问的时候不要说自己的TDS是多少,这是没有意义的,一定要详细测量其中具体数值,否则吧友也帮不上忙】
NO2/NO3/NH4-这里需要让大家简单了解一下水中的有机物循环过程:鱼虾粪便和喂食残渣等有机物通过腐生细菌分解出NH4,就是氨。氨对绝大多数的动物来讲都是纯粹的毒物。不过虾缸有一点好处就是PH往往较低,低PH下NH4毒性会减弱。
随后NH4通过亚硝化作用变成NO2,同样是毒物,其实就是我们常说的亚硝酸盐。NO2再通过硝化作用变成NO3-硝酸盐,积累在水中。自然界中的硝酸盐可以通过反硝化作用把硝酸盐分解,但是我们水晶虾缸内普遍是没有这个环境的,所以NO3会在缸内积累。部分通过水草和浮萍吸收,部分残留在水体内,通过换水缓解。
在这里我不会提这几个数值应该维持在多少,每一个缸子不同的时期都有不同的数值,所以数值只能参考。但是有一点可以确定,就是长期稳定的虾缸内NH4和NO2是无限接近于0的,NO3由于各个缸子情况不同,不予具体解释了
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