Yes you can. Chances are it will have calcium deposits that you will need to remove (vinegar water and elbow grease). If it does not have a filter you will need to use a wet dry filter or a canister filter can be plumbed to use the overflows.
125g - FX5 - CF500UV - Bichirs - Catfish - Clown Loaches - Oddballs
40g Breeder - Fluval 306 - HW402B - Grow Out Tank - Clown Loaches - Leopard Leaf Fish