01-21-2012, 09:25 AM
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Originally Posted by kc27
Thanks for the ideas and suggestions. I apologize because my first post wasn't clear, and I think that lead some of you to try to solve a problem I did not have.
I should have clearly stated that I never completely removed all of the existing gravel. I checked the water chemistry this morning, and all levels are fine. Specifically, the ammonia level is zero, the same as another established tank in the house. The second tank did not had any such substrate changes, so I know that tank's cycle is intact and is valid for comparison purposes against the first tank , where I did make the switch to sand.
It looks like GwenInNM and Tazman's theory about a period of adjustment was correct, because this morning the cories are no longer avoiding the bottom of the tank. I was wondering about their behavior yesterday because everything I had read said that cories prefer a sandy bottom. When that didn't appear to be the case, I thought I might have done something wrong.
Thanks again for all the ideas and suggestions everyone.
Good for you! They will love it! Enjoy the sand bottom tank - the best in my opinion :)