questions from a beginner

orillian

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I have 2 questions:

1) Do corys or otos hurt/attacl/kill other fish? A guppy just died, as it happened quite suddenly and it was not sick before, I suspect foul play. The guppy did not look like it had any typical fish disease. (I am a physician and it looked to be that the fish died of some kind of internal hemmorhage. The fish turned dark black overnight. )

2) I have a 40 US gallon tank with 4 guppies, 4 platys, 5 danios, 1 bronze cory, 1 pepper cory, 2 otos, and 3 small platys (about half the size of an adult). Am I overstocked?

3) I worry that the corys and otos are not getting enough food. I feed my other fish twice a day with flakes. I feed in very small amounts (worried that I will cloud the water) so not a lot of food end up at the bottom of the tank for the corys. I have tried feeding shrimp pellets and algae tablets but the other fish get to the food before the corys. I bought a automatic feeder a few days ago, my intention is to use it to dispense pellets and tablets in the early morning (say 2 AM) when the other fish are sleeping. Knowing that corys are nocturnal, they should have a better shot of getting to the food when the other fish are sleeping. Sounds like a good idea?

Please help.
Thanks for your help in advance.
 
1: Cories and Otos are peaceful fish and don't attack other fish.

2: Not overstocked though you should get more of both species of Cories, at least two more of Bronze and Peppered if not three more. Same with the Otos.

3: Depending on whether your food sinks or not, the Cories probably aren't getting enough so you might want to get food that sinks if you don't. Cories are bottom feeders and rarely go to the top for anything but quick gulps of air.
 
1 + 2 - I agree with Teelie

3 - sounds like a good plan to feed them after lights out, i often give my cories a sinking wafer after lights out in the hope that my greedy tetras won't find it. ;) you could always try hiding it so the others dont find it but i dunno if that would work.
 

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