Ok thank you! How long would it be able to live in a 150g tank with a 55g sump and 2 hob filters and a fluidized sand bed filter
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What are the dimensions of your 150g tank? Babies blacks and smaller juvies tend to have a growth rate of an 1" a month if they are good eaters(they are not piggish like silver aros). So figure in a year it'll be about 16", 18" is gonna be about max for a 150g with the proper dimensions. In 18 months it'll be nearing 24" and definetly too big for a 150g.
Larger wild caught blacks(10-12") generally don't take to eating as well. Most see much slower growth rates with them and may actually last longer in a 150g tank. But don't count on this, better have plans for upgrading to a proper tank within 12-15 months from now.

