water hardness
51dGH — Degrees of general hardness (dGH) is a unit of water hardness, specifically of general hardness. General hardness is a measure of the concentration of metal divalent ions such as calcium and magnesium (Ca2+, Mg2+) per volume of water.… …
52DGH — Degrees of General Hardness (dGH) is a unit of water hardness, specifically of General Hardness.General Hardness is a measure for the number of calcium and magnesium cations per volume of water. 1 dGH corresponds to 10 mg of calcium oxide or… …
53Dishwasher — This article is about the appliance. For manual dishwashing, see dishwashing. For the video game of the same name, see The Dishwasher: Dead Samurai. [1] …
54degree — 1. (° or deg) the standard unit of angle measure, equal to 1/360 circle, 60 minutes, 3600 seconds, or about 0.017 453 293 radian. So far as we know, this unit was introduced by the Greek geometer Hipparchus of Nicaea (ca. 180 ca. 125 BC),… …
55Hemigrammus erythrozonus — Taxobox name = Glowlight Tetra status = secure image width = 250px regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Characiformes familia = Characidae subfamilia = Incertae genus = Hemigrammus species = H. erythrozonus binomial …
56EDTA — Chembox new Name = EDTA ImageFile1 = ethylenediaminetetraacetic.png ImageSize1 = 200px ImageFile2 = EDTA xtal 3D balls.png ImageSize2 = 200px ImageName2 = Ball and stick model of the EDTA molecule, in the zwitterionic form found in the solid… …
57Ethylenediaminetetraacetic acid — EDTA redirects here. For other uses, see EDTA (disambiguation). Ethylenediaminetetraacetic acid …
58Thermal power station — Republika Power Plant, a thermal power station in Pernik, Bulgaria …
59Cutting fluid — Thin wall milling of aluminum using a water based cutting fluid on the milling cutter. Cutting fluid is a type of coolant and lubricant designed specifically for metalworking and machining processes. There are various kinds of cutting fluids,… …
60Substrate (aquarium) — Gravel in a freshwater aquarium The substrate of an aquarium refers to the material used on the tank bottom. It can affect water chemistry, filtration, and the well being of the aquarium s inhabitants, and is also an important part of the… …
