I'm the same; ready to get the sand and make the switch, just need to make the decision whether to move the fish out and into a bucket hoping for a quick swap over, or buy a big plastic 40 l container to put the fish, heater and filter in, so I can take my time, or do it with fish in, and then whether to do bottle method of cleaning or traditional! Might compromise by leaving fish and half water in, slowly scoop out gravel and ornaments/silk plants (nice and quick with no real plants!) one day, then fill back up with treated water and try bottle method for sand washing and adding next day. But if it doesn't work, I'll have a messy sandy tank to clean! Don't think corys will mind being in the tank while I do it, they're always very bold and inquisitive, but tetras will get stressed out I expect. What a dilemma......