Thanks for all the info, guys :smile:
Well, so far he hasn't done much: during daytime, when his tank lights are switched on, he's just staring at the back wall of the tank, behind some plants, but I did notice that he's keeping a close eye on me when I approach his tank. When I turn off the lights, I can see him swimming around a bit, but he mostly just hovers in front of the tank, looking into the room (I think...)
He shares his tank with about a dozen little tetra's and some cory cats, but he has shown no interest in them whatsoever. I doubt the previous owner ever fed him feeders, since he didn't mention it when I asked him about the diet. He used to be fed with shrimps, chicken, fish fillet and smelt, so that's what I'll feed him as well...
On a sidenote: he still seems to be acclimatizing, so I won't feed him for a while. How long would you guys wait until starting with feeding?
I have decided to remove the sandy substrate today, as it puts a heavy strain on the pwerhead and filtration (need to be cleaned of silt at least once a week, and since I'm going on vacation in a few weeks, I don't want to risk anything...)
It also seems to cause fine hairs and a thin layer of silt on top of plants, wood, tank walls and equipment, which looks absolutely horrible (like no tank maintenace has been done for months...
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Thanks again for all the info, guys, and if you remember other things that might be use-/helpful: it's appreciated...
thoroughbred: the largest manueli I've seen on pictures was about 17" in length, but people say they can get much larger (up to 24", if I remember correctly). I wonder how old a manueli that size would be...