i got stop by the bangkok customs too. u need to know the other country's rules and regulation. as for s'pore AVA told me as long as it is not endanger. not more then 3 litres of water and not more than 30 or 50 pieces of fishes. (can't rememder how many pieces)
my prizm motor bracket also broken. so when i was at aquarama i went to ask whether they sell the motor only. one of the salesperson there told me that they are going to sell it but the price is not out yet. so got to wait and see.