Grow out tank for black piranha

[viking252200]

hi guys,
I have an empty 20 gallon long and I was sort of thinking of getting a black rohm...
The fish in question is around 1"

Is a 20 gallon ok for a while?
I know they do get fairly big and I will of cause get a bigger tank in due time.

 

[heavyhitter]

1" you will be fine for a bit, look at a 125, preferably a 180 if you plan on keeping him for life.

 

[viking252200]

thanks for the reply
I tend to keep my fish for a very long time...
Don't often buy new fish...And when I do I am in it for the long run

So hopefully I can enjoy my baby rohm for a couple of decades

 

[nzafi]

They tend to get to 5in relatively quickly. I think within the first 6 months to a year. After that they drastically slow down to about .5in growth a year. I kept a rhom for 17 years and he went from 3in to 10in.

I'd stick with the 20g for a bit then upgrade. If possible I'd jumped to a 120g but you can always to 75g first. I don't think 180g is necessary based on their swim habits. No one has grown a small one past 12in. Any exceeding 12in were brought in at 9in or larger.

 

[Rio Kaiju]

When I first got my Rhom,It was the size of a nickel so I put it in a 5 gallon. Now, three years later, its about 8 inches or so. And, in a 40 gallon breeder. I have a 75 gallon for it but it doesn't use the whole 40, and hates being moved.

If I can suggest - put it in the largest tank, and never move it. I've moved mine three times, and each time it becomes fearful of me, and acts reclusive for months.

 

[viking252200]

I'll keep him in the 20g until he's a bit bigger and then move him to his final tank..don't want to move him too many times.

I'm thinking about getting either a 6x2x2 or a 4x3x2..volume wise they're identical...which one would be better?

 

[hrdtimes]

I'd say the 4x3x2