Didn't even know this thread was around!
There is hope on this forum for fishy lovers!

The fishyness cycle as it called is the nitrogen cycle and getting PH values right and constant is half the battle & fun.
I would look into plants and decent co2 set up for tropical. Plants really help with algae build up and removing the Ammonia nitrates. Removing 10% of old water and wash the filters out in it is the best course and then top up with DE-chlorinated water after. Api do a good testing kit for around £18 which has about 10 tests to work out the eco system.
I leave at least one week before sticking fishes into a tank and the last day I would transfer the old filter from the old tank to spread good bacteria into the new eco system to speed things up!