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Thanks for the replies. After a couple of weeks of waiting after the tank cycled, it turns out my LFS received Habrosus -- first choice, since my tank is so small and since they only get to be about 1.4" as adults. So I bought three adorable tiny mites two days ago! They're the only fish in the six-gallon cycled tank so far, but I really, really want to introduce a female betta when the Corys are settled in and apparently disease-free.
I don't know what behavior to expect of Corys, though, especially in this pygmy variety.
I was amazed when, after acclimating them for a couple of hours in the bag, all three "went to work" instantly, grazing, swimming around and very busy. I expected them to hide for a while. They're all babies. The largest one is probably about 1/2". The next day, I noticed the largest one swimming around with one of the smaller ones and they seemed to become friends. But the third one (I think I can tell a very slight difference in the markings between the smaller two) seems left out. Is this normal, or could he/she be sick? While the other two were grazing around independently and together tonight, the third one went up to a leaf on a live plant about 3" from the water surface, and just sat there.
The rest of tonight's story is cute, but could possibly have a sad ending. While taking a gulp of air, the big one noticed the little one resting on the plant and came down to rest beside the little loner, touching his (probably her) pectoral fin to the little one's. They were perfectly positioned side by side. No kidding, it looked like she was holding his hand! But the little one hardly reacted. They just sat there like that for at least 10 minutes, then the big one went back to grazing on the substrate. The little one subsequently moved from his perch and started swimming around, and I'm pretty sure he's now the one grazing while the other two are resting, but he doesn't seem as active as the other two. Is this normal behavior for three little Corys introduced two days ago to a new tank? BTW, they very well could be from the same spawn.
Other questions: Yesterday, I gave them a shrimp pellet and a couple of free-sample-type flakes. It's hard to tell because my tank is so messy with brown algae, but I don't think they've eaten them. They seem very interested in the substrate, which probably has yummy rotting shrimp from my fishless tank cycling. Is this normal?
Tank tested just fine both before and adding the Corys: 0 ammonia, 0 nitrite, 5 ppm nitrate.
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