Alright I can do thatWell the bichers you dont really need to watch out for cause the aro will out grow them no problem. But aros usually grow about 1 inch a month minimum which is very rare but they grow 2-3 inches a month regularly so 12 inches and if the aro is 4 inches you have a good three months before you need to upgrade if the tank is 12 inches wide.
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