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> 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
> can dig up your plants as they bury themselves.
> 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
> it was an impulse buy but so far I am very pleased with the addition. It
> of the species Hystric. Common name is "Mottled Ray". These are suppose
> 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
> to be content to just glide around the tank. I have a cleared area that
> is particularly fond of when active. When resting it sits under the
> 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
> of adding the ray. Do any of you know a down side to keeping these guys
> 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
> 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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