[mousey]

you could remove some of the fish and keep them in a bucket for a few days. i just did this when i had to move my fish in a hurry because of a leak. Even tho i used a lot of the old gravel and the old filter it took 13 days to get the new tank completly cycled. Also get your self a few bunches of either water wisteria or hornwort to soak up the ammonia. Back to keeping fish in a bucket. i have electric heat so can raise or lower each room individually. Put the room up to 72 and the swords and black skirt tetras stayed ok for a week. i did partial water changes on the bucket every 2 days and bubbled extra oxygen into the bucket twice in a week and a half.
Once i cut the poop load down and increased the fast growing plants in the tank the ammonia level went way down.
However then the nitrite went up. However water changes, a bit of salt and extra oxygen to the tank kept the fish nice and safe. When there was no more nitrites, i added the fish back into the tank 2 at a time and monitored the water in 2 days. if the ammonia and nitrite levels were 0 i added two more fish.
Mouse