Ok, I've had my 3 Ottos (2 from Petsmart, 1 from local store) for about 3 weeks now. One of them is fine, his name is Zippy for obvious reasons, that's all I'll say about this one. Another, I thought was pregnant, but has been so for about 2 of the 3 weeks now. Seems much wider and larger than Zippy, eats like crazy too. It will down half a slice of Zuchini in a day, but seems rather lethargic. Again, signs of pregnant/eggs, but for 2 weeks I'm starting to doubt. This fat one is also easy to catch, I went to remove a partially eaten piece of Zuchini after a couple days, the fat one was on it, it took a minute of nudging with the net before the fish swam to the glass next to it. The third has also always been lethargic. It has remained in the same general corner since I got'em. Yesterday, it was a bit unusual seeing it's nose slightly out of the water - like against the water line. Not sure how long it was like that. Today, the fish is laying on it's side in the bottom corner, barely breathing. All of the 3 fish keep their dorsal fins down unless swimming or feeding. Usually, all fins are clamped while at rest. Only Zippy has green poop, the other two's are generally darker. I haven't tested the parameters in a while, though I would suspect 7.4, 0 Ammonia, 0 Nitrite, likely 10-20 Nitrates. I can check it tonight if necessary. The tanks is a 10 gallon quarantine and was fully cycled before adding the fish 3 weeks ago.