wat size tank do u need for them? and wat can i put with them that will look good.

Silver Arowanas can easily reach a length of 3' or more in captivity...which means that an individual would need a tank at least that wide. So, to keep one alone...you'd eventually need a tank at least 36" wide. If you want to keep a group, a pond would be better, because Arowanas are known to be aggressive towards each other.

Tankmates can be anything that aren't small enough to get eaten or overly aggressive. Large schooling fish like Silver Dollars, Tinfoil Barbs, etc work....large Cichlids like Oscars, Uaru, etc all make good tankmates. You can also keep Silver Aros with Rays, but that's a whole other endeavor on it's own.

The biggest thing to make sure of is having enough filtration, enough room, and a secure top to prevent jumping.

A 180g 6x2x2 will hold one for a year or so very well. You will definitely need a 3' wide tank eventually. A couple rays and a couple of uaru would look great.

yea i might be getting a jardian arowana then cuz im running ut of room for tanks witch is really makeing me mad dont want to plum a whole new tank room.

Why a jardini? I had an otherwise docile 8" jardini kill a 14" wide bar They're crazy.

Jardini in general tend to get extremely aggressive once they reach about 12" or so. I had one at 19" that lived completely by itself in a 72 x 24" tank. Very impressive showpiece...if you don't mind that being the only fish in the tank.

well i dont have that much space in the fish room cuz thats where i put my tanks under 200 gallons. well i know where i can get a 17 inch one thats with a butt load of fish in the same tank includeing a 18 inch dovii. right now they are in a small 100 gallon. they would go in a 6' 2' 2' tank and maybe eventualy a much much much much larger tank with a large TSN cat.
can a 4 inch silver arowana go in a 180 or 200 for like 1 or 2 years with a orante poly sengals and a retropenis?

That would probably be ok. Jardinis can get just about as big as silvers. I've seen a 30" jar before. ..

so its ok for a silver arowana to go with the polys.

Provided one can't eat the other it should be okay.

well the retropennis i got is about 4 inches there is a crap load of hideing spots. but the jadian would kill the polys right?

Jadian? You mean jardini? He could very easily kill them just to kill them, but maybe not. It's definitely a risk. Much more of a risk with a jar than a silver.

Not all jardini are killers. All aros have different aggression level. I have a green a 15" jardini with a 13" green asian arowana and some polypterus (12"-18") and ropefish. Even clown loaches at 7" are not being bother. Jardinis are become aggressive because they are being kept in a small tank with only a few fish as tankmates.

Here's my 15" jardini.

yea how big is that tank it looks huge it will be in a 6' 2' 2' and ill have some oscars and other larger cichlids and a few polys i got a 17 inch ornate thats the main reasn om getting this tank but i just love arowanas and have nly had a few.

The aros and tankmates on the pics were taken on a 310g but now I moved them to 535g now.

...or they're not aggressive because they're in an overcrowded tank. Arowanas in general are known to be aggressive towards their own kind. Keep a Jardini busy with a school of other Arowanas and the story changes a bit. Keep them singly, as I prefer to keep them, and they have nothing to worry about...they're the king of the tank. I've always preferred to keep Arowanas singly because that way you have a perfect showpiece. Keep a group and there's almost always some level of fin shredding and damange.

My Jar was not in a small tank for his size...72 x 24" and I couldn't keep anything with him. He was by himself and he had plenty of room.

It all boils down to what you want...a knot of fish swimming around in a tank that can't go far without bumping into each other or this:

Most arowanas especially asian aros and aussie aros become very aggressive to the point of killing it's tank mate if it's been kept single when it was young. That's why I keep aros together of more than 4. They just keep swimming and not even show aggression to each other. But if kept 3 or less then you will expct some fin nip or fighting.

That Jardini was kept in a community, all the way up til about 12"...then it started killing off tankmates. It killed or nearly killed some of the most aggressive fish out there...Trimaculatus, Cintrinellum, etc.

That's when I decided to make the tank into a single species show tank. People would come into my house and not even take a second glance at my Ray tank and dropped jaw on the single Jardini tank.

Many people don't have the room or money to have an adequately sized tank for a group of Arowanas. I certainly don't have public aquarium funds. But, many people can afford to have a 72 x 24" tank...which can accomodate a single Jardini. And like I said, it also boils down to preference...I just like them kept alone and perfect. Great for photography.

Only if I have enough space at home to keep lot of tank. Ten I'll put them separately and turn them as a show aros.

well i guess i have decided on wat to do im just gona get a 125 for some more polys then im gona save up for a 8' 3' tank for a single jardini arowana and maybe some type fo medium size cat like a oxydoras niger or megladoras and that will eventualy be in a bigger tank to.

ill put them in a 6ft tank to prevent gill curl