water hardness
61Rappbode Dam — The Rappbode Dam is the largest dam in the resin and at the same time the highest one in Germany. It belongs together with further dams and retention basins to the flood protection system in the east resin.clarifyme|What the heck is a resin???… …
62Borax — For other uses, see Borax (disambiguation). Sodium borate redirects here. For sodium perborate, see Sodium perborate. Borax …
63DH — (dh or dH)) hardness, expressed in degrees (Germany). 1 DH 17.86 p.p.m. Also used, confusingly, for water hardness generally as there are English, American and French measures too (see degrees of water hardness) …
64Rainbow shark — Taxobox name = Rainbow shark status = LC image width = 250px regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Cypriniformes familia = Cyprinidae subfamilia = Bilateria genus = Epalzeorhynchos species = E. frenatum binomial =… …
65жорсткість води — жесткость воды hardness of water, water hardness; hard of water, stiffness of water Wasserhärte, Härte, Härte des Wassers – те ж саме, що й твердість води. Застарілий термін …
66Rummy-nose tetra — Taxobox name = Rummy Nose Tetra image width = 250px image caption = Rummy nose tetra regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Characiformes familia = Characidae subfamilia = incertae sedis genus = Hemigrammus species =… …
67Eriochrome Black T — Chembox new ImageFile = Erio T.svg IUPACName = sodium (4Z) 4 [(1 hydroxynaphthalen 2 yl hydrazinylidene] 7 nitro 3 oxo Y naphthalene 1 sulfonate OtherNames = Eriochrome Black T, Solochrome Black T, EBT Section1 = Chembox Identifiers CASNo = 1787… …
68Disease in ornamental fish — Ornamental fish kept in aquariums are susceptible to numerous diseases. The study of fish diseases has remained a rudimentary branch of veterinary medicine.[citation needed] Due to their generally small size and the low cost of replacing diseased …
69ЖЁСТКОСТЬ ВОДЫ — свойство воды, обусловленное содержанием в ней солей кальция или магния, вызывающих образование твёрдого осадка (Болгарский язык; Български) твърдост на водата (Чешский язык; Čeština) tvrdost vody (Немецкий язык; Deutsch) Wasserhärte (Венгерский… …
70degree — 1) 1/360 of a circle or 60 minutes. The symbol here and below is ° 2) 60 nautical miles, 69.05 statute miles or 111.12 km 3) a temperature unit (Celsius or Fahrenheit). Strictly 10°C is an actual temperature while 10C° is a range (from say 23 to… …
