WATER, HARD: With Activated Charcoal to Remove Calcium

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin about 5 years ago.

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It will not work; only certain types of organic compounds are filtered out; units for doing the job properly are not cheap; best bet is to catch rainwater. A74-433
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More The Orchid Doctor Articles under the Heading Water, Hard

Water, Hard Comments
WATER, HARD: Causes Calcium Deposits on Cattleya Leaves The acidification of water from the hose gradually dissolves the deposits; see method described, A69-126; A71-609 0
WATER, HARD: Characteristics The critical factor is the soluble salt content; over 150 ppm. of calcium carbonate (CaCo/3) is hard, soap does not produce good lather; waters with less than 125 ppm. are excellent; up to 500 ppm. are all right; 500 to 800 are usable with caution. F80-8 0
WATER, HARD: De-ionized Water for Plants For a few small plants one can buy the kind of water sold for steam irons in areas where the local water has a high sodium content. OD79-53 0
WATER, HARD: Deposits on Tree-fern Rafts To dissolve these use a little nitric acid at pH of 4.0 to 4.5; add a few drops of dilute nitric acid to a plastic bucket of water and soak the rafts for 1/2 hour. A75-680 0
WATER, HARD: Devices Available for Removing the Cause There is no simple device for removing calcium and magnesium from tap water; water-softeners create water unsuitable for orchids; demineralization units are expensive; paphiopedilums grow in limestone soils and are not harmed by "hard" water; possible to acidify hard water with citric or nitric acids. A72-204 0
WATER, HARD: High in Calcium and Magnesium Salts Its nature and characteristics and suitability for growing; has high electrical conductance; comments on water-softeners; refer to A67-466+; AH39 0
WATER, HARD: Near Maximum "hardness Index" If the water coats pots and plants with lime residue, perhaps rain water should be collected for periodical use; demineralizer units are expensive but laboratory models are more moderate; address given. A73-709 0
WATER, HARD: Softened with Soda Ash Do not use this on plants. A67-466; A78-812 0

New Topics

  1. Fritz wilke asked question This is the plant in category General Discussion
  2. Fritz wilke asked question What kind is this in category General Discussion
  3. Fritz wilke asked question What kind of orchid is this? in category General Discussion
  4. Robert Stagner asked question cattleya mossiae Willowbrook in category General Discussion
  5. Judith Pariseau asked question Paphiopedilum culture differences in category Paph Alliance

New Comments

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  2. Carol Holdren commented on topic "What kind of orchid is this?" by Fritz wilke
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  10. Jan E Teitsworth commented on topic "Can anyone identify this orchid?" by Jan E Teitsworth
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  14. Joe L commented on topic "ID of this Oncidium? " by Joe L
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