03-26-2009, 03:12 PM
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Originally Posted by 1077
I read an interesting article on the subject of corydoras, and substrates just the other day.
In this article some biologists suggested that nitrAte levels had more of an affect on the erosion of barbels(whiskers) of some of the corydoras than substrates that were too rough.
They cited the fact that these fish are found in a wide range of waters with very different substrates other than sand or smooth pebbles. They even went so far as to expieriment with substrates such as sintered glass and found no examples of barbels being damaged from this substrate (didn't say as to their bellies). Their expieriments did show barbel erosion with water high in nitrAtes (organics) as opposed to water of good quality.
My own observations of these fish in respect to substrates, is not in line with their findings. I have observed corys recover from barbel erosion when placed in tanks with sand or small ,fine gravel ,with nitrAte readings being same in these tanks. I also believe that NitrAtes should be kept at minimum not just for corys, but for all fishes.
Sand or very fine gravel, would be my choice for substrate for these fish and as stated, NitrAtes kept in check.
Good advice. May I ask where the article was? I agree with your position, but I'd be interested to read this opposing view.