Re: [APD] How do you guys do water changes?????

[Laura Burbage <leuhrich at yahoo_com>]

Mark,

Regarding your new algae mystery despite years of the
same routine, you don?t say if you have been testing
phosphorus.  Some municipalities now put phosphorus in
the water as a means to lessen the corrosion of pipes
(to lower the amount of lead in the tap).  Your
municipality may have started that recently, and you
may have a lot more phosphorus being added to your
tank than you did previously.  

I did some searching (read: avoiding work), and found
in a 2002 document
(http://www2.nrdc.org/water/drinking/uscities/pdf/la.pdf)
that ?LADWP says it plans to install corrosion control
treatment that will make L.A. water less likely to
leach lead from pipes.?.  I couldn?t figure out what
their treatment plans were, though.  But it very well
could have been polyphosphates.
This site may also be related to you locally:
http://www.ladwp.com/ladwp/cms/ladwp001437.jsp  

Good luck,
Laura


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