My family will be moving on Friday and I need to relocate 5 tanks. Hmm. My thought is to put five gallons of water in a bucket, add fish and then secure the lid. I plan on putting the gravel and media in another bucket and moving the tank empty, replacing origional gravel and putting the fish back in. This should be fine, in my opinion for the 5, 2 10s, and 29 (stretching it on approx. 7 gallons origional h2o). What should I think about for my 75? Is there another technique? Trying to use Biospira as a last resort, as it didn't do a hoot when I started te 75 in December. By the way I have a three week window until my current lease is up, so the tanks can stay until the initial move is settled. My neighbor can feed in the meantime. The move is 20 mins away, so the elapsed time out of filtered oxygenated water should only be an hour.