[APD] Stingrays

[James Foley <foleyjames at shaw_ca>]

> Potamotrygon hystrix is probably what you got.
> They get about 30 cm in diameter and are quite sensite to their water
> conditions as you already know.
> Potamotrygon are more inclined to eat fish then other Genus of rays.
> They should be kept with either a sand bottom or very fine gravel as they
> like to bury themselves. This is the one spot you may find probelms as
they
> can dig up your plants as they bury themselves.
>
> Regards,
> James
> Aquarium Club of Thunder Bay meets on the first Wednesday of every month.
> 8:00 pm Confederation College room C216
>
> > Message: 6
> > Date: Sat, 20 Dec 2003 15:00:32 -0500
> > From: "John Thompson" <jdt70 at earthlink_net>
> > Subject: [APD] Stingrays
> > To: aquatic-plants at actwin_com
> >
> >     I recently added a freshwater stingray to my planted 55 gal.  I
admit
> it was an impulse buy but so far I am very pleased with the addition.  It
is
> of the species Hystric.  Common name is "Mottled Ray".  These are suppose
to
> be the smallest of the freshwater rays and doesn't get any bigger than a
> pleco.  I was a littled worried that it might dig things up but so far
seems
> to be content to just glide around the tank.  I have a cleared area that
it
> is particularly fond of when active.  When resting it sits under the
leaves
> of my bare root anubis.  Weekly water changes are necessary to insure
> nitrate levels stay low.  Freshwater rays are suppose to increase the
> nitrate levels as a biproduct of their osmoregulation.  I have good
> biofiltration and I do regular water changes anyway to prevent build up of
> excess nutrients.  So far I have not had any undesirable changes as a
result
> of adding the ray.  Do any of you know a down side to keeping these guys
in
> a planted tank?  From w!
> >  hat I have found on the web the water conditions of a planted tank are
> exactly what they like.  The literature says they like the same conditions
> as Discus.  Makes since since they come from the same rivers.  All reports
> that I have found say the will ignore most fish.  I can confirm that they
> love shrimp.  This would preclude having any of the expensive ornamental
> shrimp in with one.  Ghost shrimp sell for 20 cents at most stores so I
keep
> the tank loaded with these and the ray takes one every day or so.  It also
> will happily take frozen shrimp from hand.


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