The transition ...... hmmmmmmmmm............ I have an Eheim Pro 3 cycling on the altum tank at the moment.
I'll move the driftwood, some plants and all the water into the new tank, although 350 litres in a 1400 litre tank won't go far, carefully match the pH and hardness and temperature, then slowly and carefully add the altums one at a time to their beautifully decorated tank.
Then sit back and
PANIC
for the next two weeks. :shock: