Hi I have a fully cycled 25 litre aquarium and I am buying my betta a 45 litre aquarium, you get the filter, heater etc with the new tank but I wondered if the filter out the 25 litre would fully support the 45 litre instead of having to use the new one, i have the 1 male betta on his own so the bioload wouldn't be to much, what do you think?