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Re: [APD] aeration & a planted tank
And "pearlescent" can be ascribed to Scott's words.
Thank you, Scott. (Sorry, just had to get that in, I've
had a silly day):-)
> Pearling is a sign of O2 saturation.
> --- "Terry S." <tgs1 at rni_net> wrote:
> > > However, even without CO2 injection, a heavily planted
> > > aquarium can (mind you I say "can," not "always will")
> > have
> > > more than adequate O2 at night with adding the bubbly.
> > In
> > > fact, I haven't in my own limited experience seen an O2
> > > shortage unless the electricity shutdown overnight and
> > the
> > > pumps stopped. Which is why I've been curious about
> > your
> > > set-up.
> > Another 2 cents worth of observation on this... I have a
> > 30 gal tank, very
> > heavily planted, 55W CF, no CO2 supplement (but I do
> > supplement C with
> > Excel). Every time I do a large water change (usually
> > with fertilization
> > and Excel), the plants pearl madly for a couple days, and
> > I can count on
> > seeing the fish at the surface 'gasping' for oxygen in
> > the mornings. One
> > thing to note is that here in Phoenix, the water temp in
> > the summer is often
> > well over 80' F straight from the 'cold' water tap, and
> > the tank usually
> > runs around 80-82' F, or sometimes even higher.
> > I'm guessing that the increase in temperature is
> > contributing to the O2
> > depletion since the water holds less at higher temps.
> > After following this
> > thread, I've decided to add some aeration at night to
> > reduce the stress on
> > the fish. It'll be interesting to see if the phenomenon
> > goes away this
> > winter when I can keep the tank at a lower temp.
> > Terry S. in AZ
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