01-04-2012, 04:52 PM
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Wild angelfish and commercial (usually tank-raised) angelfish are different in their needs as zof has mentioned. This is noted in our profile of Pterophyllum scalare [click the shaded name for the profile]. Water hardness, corresponding pH and temperature are involved.
Some fish follow this pattern, the common Blue Ram is another that comes to mind. Then there are those that do not do well regardless.
And zof is also correct in that most angels seen in stores will be commercially raised. You would need to find a direct importer for wild angelfish. I am fortunate here in Vancouver to have a couple of resident importers who manage to bring in wild Pterophyllum altum angels in season, and sometimes P. scalare. The wild fish are remarkable.