my silver aro grew up from 6" to 20" inches in 12 months, thus your aro is good for one year in your tank. after that, you will find that your fish will bite his/her own tail due to tank size.
no. he/she will lost his/her tail and will have some deformities due to tank size... whenever an aro sees his/her tail when turning, he/she will grab it thinking it is food....then dart aimlessly when hurt himself/herself......soo according to this you think a 20in aro is ok in a 12in wide tank?![]()