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RE: [APD] Microwaving water for water changes a bad thing?
Date: Wed, 23 Feb 2005 13:43:54 -0500
From: "Wise, Nicholas" <Nicholas_Wise at lgeenergy.com>
Subject: RE: [APD] Microwaving water for water changes a bad thing?
To: "aquatic plants digest" <aquatic-plants at actwin_com>
The reason chloroamine is added instead of chlorine is that chlorine is
easily driven out by aeration. Chloramine is mush more stable.
That is a strictly secondary benefit. It was discovered that chlorine
combines with organics in the older water pipes to form carcinogenic
trihalomethanes, like chloroform. Chloramine started being phased in to
the larger water systems with higher risk about 10 years ago, with the
timing dependent on the size of the system and the hazard level.
A few big systems like SF haven't had to do it until the last year or so
because their water was so pure and free of organics from agriculture,
etc. They get pure snow melt from the Sierras by way of the Hetch Hetchy
system. Smaller towns still may be using chlorine, and the cancer threat
is real, so carbon filtering water to make it potable (and harmless to
fish) may be a very good idea.
Amquel was originally developed because many midwestern towns had enough
ammonia from agriculture that was combining with the chlorine and
forming chloramine, naturally, that aeration and standing didn't work.
The half-life of agitated water containing chloramines can be 5 weeks or
more. You can do the math yourself to see how it gradually builds up
with even quite small water changes.
Amquel, Prime, Ammo Lock 2, etc. are good solutions for the display
aquarium or community tank. The ammonia is available to the plants but
doesn't harm the fish.
For the serious breeder, they are a potential disaster. Small baby fish
depend (more than many think) on micro-critters we call "Infusoria." The
formadehyde-like compounds used to tie up the chloramine is deadly to
many living creatures up to the complexity of Daphnia and Hydra. The
breeder should be aware that his protection of the adult fish could be
starving their babies and slowing growth, stunting them, etc.
He/she should use two carbon filters in series, with a tap between and a
valve to assure very slow flow through the filters. Testing between can
catch the eventual tendency for "punch through" and let the first
cartridge be replaced with the nearly unused second one, while a new one
is placed in location #2. Chlorine and chloramine read the same on any
cheap pool test kit (or the expensive identical one from the LFS). Test
to be sure flow rate is slow enough, for chloramine is not easy to
filter and requires somewhat longer contact time than many other
Wright Huntley - Rt. 001 Box K36, Bishop CA 93514 - whuntley at verizon_net
...frontier society offered ‘the most civilized type of association’
because it had ‘the absolute minimum of external regulation’ and
therefore ‘the maximum of voluntary civility and morality.’
------ Isabel Paterson
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