Hey
I did this about to weeks ago with a 40 gallon tank and this tank already had 3 fish in there 1 common pleco, 1 large rainbow shark and one Chinese algae eater. I didn't lose any
here's a step by step guide on how to move it
1. Prepare, have at least 2/3 buckets on hand to hold subtrate, ornaments, plants etc etc. You will also need a large plastic bin so you can transport any fish.
2. Look at diameters and know where your tank needs to go straight away
3. Arrive on scene, fill one of the buckets up with water and start un planting and fill this bucket with them
4. Fill up your large bin and take your heater and filter and place these in this bin turned on, now capture the fish and place them in this bin, cover the lead (preferably with a damp towel)
5. Fill another bucket with water and keep this
6. Fill another bucket with water and then remove and place all substrate and ornaments into this bucket
7. Empty all further water from the tank in a drain
8. Unplug heater and filter but make sure you keep the filter wet in tank water so you dont lose any beneficial bacteria
9. Get home ASAP an plug your heater an filter back in so the fish feel comfortable
10. Just reverse these steps so fill tank with plants ornaments and substrate slowly adding the water collected in the buckets once all this is done add some warm dechlorinated water so it's roughly the right temp, put your heater and filter and whatever else into your tank then add fish and the water they were kept in and hey presto all done
Hope this helped