05-08-2007, 11:03 AM
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They are sensitive fish, but the pH shouldn't be an issue - mine are in water typically 7.2-7.4.
Acclimate them carefully, give them plenty of "shade" and plants to hide in, and make sure food is available right away. All the Otos I've had have done well with algae wafers, though some people report their's won't touch it, so try that, and grab some cucumbers and zucchini, wash them carefully, peel them, stick them in the microwave for 1-2 minutes and clip in the tank for about a day and a half. (It's really bad if it disintegrates too much to scoop out of the tank - you end up with fungusing little pieces of cucumber every where you can't pick out with your hands.)
You need to be on par with regular water maintenance. A lot of times an Oto will give me the first sign something is off, usually by sticking itself to a wire towards the top of the tank and not eating and moving much.