Happy'Cam'per wrote:

"~ jan JJsPond.us" wrote in message
...

See
http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex6607?opendocument
pH plays a very big part on whether a plant can take up nutrients, with
some able to do it at lower pH and some at higher, but most need to be in
the medium range. ~ jan

Just perused the link you supplied and this seems to be pertaining to
terrestrial crop soils which is a completely different system. I can't
comment on PH in soils as I have zero expertise in this field ;o.
However, when it comes to aquatic plants I can assure you that plants are
more than comfortable within our ph ranges, lets say between 7 and 9, is
that reasonable?
Aquatic plants will not do better at low ph ranges, but will thrive in
high ph's. The more mineral salts the better.

That's true of some - hornwort comes to mind as being particularly fond of
dissolved minerals - but ime Water Hyacinths practically have to be put
into more acidic water when they look limp.
--
derek