at meal timeJust photograph em with a bright light .
Since this I have made it my mission to figure out how many Otos I actually have. A pulled out all the driftwood and ornaments and gave all the plants a good swish with my hand (normally more than enough to get the Otos to show themselves) and had come to the conclusion I had lost three and there was only a single Oto left. Tonight I came back and sat down next to the tank and noticed I could see two Oto tails poking out. Had a quick look and found all four I thought were in there just chilling on the back glass behind a small ornament. Was literally only sitting down for a minute before heading to LFS to buy six more. Guess I only need three more thenThey have never shown any interest in algae wafers but I do add them for the nerites and others and there is plenty of algae and film to munch on. They have only ever shown a passing interest in that (and peas, spinach...). There are also some oak leaves in there near where they spend most of their time but I have never seen them on these leaves. Just odd that if they have died that I have never found any remains. I know the amanos would do a decent job of cleaning up but being armoured catfish I would have expected to find skeletons. Need to pull everything put and check again this weekend I think
Mine used to which is why I got concerned. They now seem happy to hide whether they hide even when I swish their favoured crypt leaves, move things around, do a water change. I would however catch a glimpse of one every so often (particularly in the evening) and where there was one you would normally find another.My Otto' s play hide and seek constantly. Strangely after a good water change they always hand out together on the front glass for an hour or so and then go back to hiding.