Howdy,
This is my last reply, I made my point and I am not enjoying this thread anymore. I bow out.
Some members made comments which I would like to address, though. After all, I am not weaseling out, I am bowing out.
Rays are born to dig and naturally cover themselves with a layer of sand. The lack of sand stresses the animal unnecessarily. What's the problem with a little sand?! If you cannot keep the water quality up in a tank without substrate, then it's time to re-think the filtration system. Maybe "condemn" was hard term, maybe "frown upon" is better. But we should not let our laziness dictate our hobby.
I don't care where people from the tropics move, and if they're cold in the North. They did it voluntarily and can wear a coat, whereas a fish doesn't have a choice.
Alfon 76 said there was no need to upgrade a 900 gal tank and I disagreed. If it is only a step in his development along with the growth of the fish, then I misunderstood his statement which, however, seemed very clear to me. (quote:"no need to upgrade anything for the arapaima")
I am starting the tank with a few gouramis and sword tails since they are little fish, with little contribution of organic waste to the system, especially in a 220 gal tank. Furthermore, I had them in two little tanks, which I added to the big one, i.e. water and filter media. It is not too much of a change for them. If I started with Pantodon right away, I would have a bigger protein input, which would make the establishment of a tank a little harder. This way, the swords and gouramis eat some algae and I only need to feed a limited amount. No, I think keeping gouramis and swords are just as much reponsibility as keeping other fish, I do not look down to them, nor do I look up at other fish (!!!)
I never gave away fish because they grew too big. I just didn't buy them. I keep the fish I purchase, give them the best home possible and try to breed them. As fugupuff stated earlier, that is the purpose of life: reproduction. You know that your fish feel (!) are as close to nature as it gets when your fish reproduce. I know swords are not a challenge. Other fish are (quite) more challenging. But this is my personal preference, and I by no means think everyone needs to breed what they keep.
Last but not least: I know how bettas live in the wild. You don't need to tell me how bettas live in the wild. But they only live in puddles during drought or when the rice fields are drained. Under optimal circumstances, they have more water than 100 ml. Otherwise, and I am sure fugupuff with this scientific mind understands it best, the gene pool would be pretty limited...
Have fun, I'm done,
HarleyK
ps
I've been a member for a month now, and it seems like my answers generally open a can of worms. I am still contemplating if you guys want to be among yourselves and not hear other opinions, or if that just applies to a few members of this forum. If you read my replies and think about them , you'll realize that they are based on common sense.