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Algae on greenhouse walls
Right you are, David.
Chlorine can infiltrate the crystal structure of most steels, which can result in stress corrosion cracking. It is more pronounced at higher temperatures as the natural vibration of the metal atoms (causing the size change we know as "thermal expansion") means there's more space between the atoms for the chlorine to penetrate the crystal lattice. -- Ray Barkalow - First Rays Orchids - www.firstrays.com Plants, Supplies, Books, Artwork, and Lots of Free Info! .. . . . . . . . . . . "DKafkewitz" wrote in message ... A note of caution about using bleach to control algae. My greenhouse has a gas heater. The instructions for the heater warn against the use of chlorine bleaches when the heater is in use. The fumes from the bleach can react with the metal of the heat exchanger at the high temperatures that exist when the heater is operating. This can, according the the instructions, greatly shorten the life of the heat exchanger. David |
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