Text 19202, 41 rader
Skriven 2007-08-17 23:55:06 av Joan Macdiarmid (1:18/200)
     Kommentar till en text av Mark Lewis
Ärende: Water
=============
 Hi, Mark,

 ML> DS> (To keep down the mosquito population, I've treated the
 ML> DS> rainbarrel with a bacterial colony harmless to all living things
 ML> DS> save mosquito larvae.  It works marvelously, without chemical
 ML> DS> pesticides.)

 ML>can you enlighten me on this, please? the goldfish just don't seem to
 ML>survive in our rain barrels... i suspect lack of oxygen but anything

 DD> Errrrmmmm ... you do know you can leave tap water in an open pan
 DD> overnight and all the chlorine that would normally harm tropical
 DD> fish  will outgas and you will have plain old water, don't you?

 ML> yes but not around here... there's no way that i know of to evaporate
 ML> lime from well water ;)

 Salt-water fish or fresh-water? I never had
 trouble with lime while keeping fresh-water
 fish in Alabama, where the calcium content
 is high (and the water is very tasty). But
 if you are keeping salt-water fish, yes,
 you have to be careful about the ionic load
 of your make-up water. Freshwater fish are
 more tolerant of ionic concentration
 variabilities, ironically (if you think
 about it). Besides, with freshwater tanks,
 you are not just topping up, but usually
 doing water replacements, so ions don't
 build up. You take out thicker water and
 replace it with thinner stuff. With salt-water
 tanks, I understand it's trickier, as all
 the ions need to be controlled.

 OTOH, could your mosquito larvae become a
 food source for your fish?!

 Joan
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