Orchid Q&A

   Air Conditioning
* Ansellia africana
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    Cymbidiella rhodocheila
* Culture of Alba Orchids
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* Leaf Color
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Q.

I collect rainwater into 150-gallon tanks under my greenhouse benches for use in watering. Sometimes the water is held for two to four weeks before use and can get pretty rank. Is there anything I can do to minimize the growth of algae in the water? I use a quaternary ammonium product in my swamp cooler and I am not impressed with the results. - John Hyatt

 

A.

Rainwater properly stored should be able to be held for a long time. If the tanks are under the bench and not covered, they can easily be contaminated by runoff from plants above and the combination of nutrients and light are ideal conditions to support algae. Proper handling of rainwater includes the following:

* The collection area must be kept clean. In Bermuda, most houses depend on rainwater for all their needs, so when the rainy season starts, they let the first few showers wash away the dust and dirt from their white roofs before the start of collection.
* The storage tank must be covered to prevent any contaminants from entering. Once contaminated, it is no longer rainwater.
* The storage tank should also be relatively light-proof, as any light will promote algae growth. -
Thomas Sheehan, PhD




Orchid Q&A

    Masdevallia coccinea
* Mastering Miltonias
    Mealybug Infestation
    Meristemming Monopodials
    Missing Pollen
    Night Length
    Night Lights
    No Flowers
    Non-flowering Doritaenopsis
    Odontocidium Wildcat
    Oncidium Sharry Baby
    Orchid Honeydew
* Paphinia herrerae
    Paphiopedilum armeniacum
    Paphiopedilum delenatii
    Phaius Culture
    Phalaenopsis Problem
    Physurus herpysmoides
* Plant Sitter
* Rainwater Collection
    Redwood Bark
    Redwood Bark
    Re-rooting Plants
    Spotted Oncidum Leaves
    Sticking Flowers
    Storing Pollen
    The Larger the Better
    Vanda Keiki
    Virus Question