The capacity of the water that very much friend won't note case of him aquatic animals (of course, ace did not look)
I am everybody introduction below:
In process of aquatic animals breed aquatics regular meeting comes up against many unit of measurement, if aquatic animals casing accumulates computation, use medical dosage, chroma to wait a moment, the Yu Youlai of certain to having chemical foundation says these are not problems, the unit be at one's wits' end that because be used rarely daily to these,nevertheless I had seen a few friends, cannot use drug correctly consequently or was to choose improper equipment, cause needless loss even. Have simple introduction to a few commonly used units below, hope to having these the friend of the problem can be helped somewhat.
1. bulk unit:
Liter (L) the bulk unit of measurement that is international standard, one liter is equal to one thousandth stere. We also regard the bulk of aquatic animals box as unit of measurement with liter normally, if use centimeter (Cm) regard length as the unit, = of common volume of case of quadrate aquatic animals grows tall ÷ of × wide × 1000, and 3.14 ÷ of × of height of water level of × of radius of × of radius of = of volume of case of cylindroid aquatic animals 1000, the result that reach is the liter number of aquatic animals box namely. General one liter fresh water has 1 kilogram to weigh about, seawater is weighed slightly a bit, cursory nevertheless consideration is OK also 1 kilogram plan.
In medicaments in using, we use smaller bulk unit normally- - milliliter (Ml) , 1 milliliter is equal to one thousandth litres. Still have a kind of rough calculation method: Natural and drippy water is 1 milliliter about 18 drops, 18 drug dripping in past aquarium that is to say is 1 milliliter about.
Drug of additionally a few entrances and equipment still use the unit that exports a nation, common is gallon (GALLON) with ounce (OUNCE) . Gallon has again imperial with US-made cent, imperial 1 gallon is equal to 4.546 liter, US-made 1 gallon is equal to 3.785 liter, should notice to distinguish. Ounce is not bulk unit actually, however maund, 1 ounce approximates 28.35 grams, some manufacturers like to make the unit of measurement of drug with it.


2. chroma unit:
The metropolis in a lot of piscicultural reference book uses the densimeter that this chroma unit regards Ppm as medicaments to measure, ppm is the abbreviate of English Partpermillion, meaning for " hundred... " . Milligram says first here (Mg) concept, 1 milligram is equal to one thousandth gram. 1ppm is equivalent to joining the chroma of the medicaments of 1 milligram in one liter water, namely 1ppm=1 milligram / liter, with this analogize, 100 milligram are joined in the water system of 100 liter namely the medicaments of 0.1 grams, chroma is 1ppm namely.

Unit of 3. water pump:
Buying water pump to have such problem constantly, it is good to buy how old water pump namely. The manufacturer of general water pump makes clear the discharge of water pump and lift in the label that can go up in water pump, the unit of discharge is liter / horary (L/H or L/Hr) , it is the displacement of horary water pump; The symbol of lift is HMAX, the unit is rice (M) , namely the greatest height that water pump can promote water, those who want an attention is this height it is the surface from fountainhead begins calculative, is not the mouth giving water from water pump. If water pump is to be used,create circular flow or drive those who divide the filter beyond trickle type and upside type, it is OK to should consider flow only commonly so (specific the relevant article that sees Cao Li) ; And the lift that water pump considers even if wanting to drive two kinds of afore-mentioned filter, because discharge is corresponding,water is reduced by the height of promotion.
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