Originally Posted by
TheGrog
I did that not too long ago by moving my 55 into a 125.
Shouldn't have to cycle the tank over if nothing is out of the water for very long. Use dry sand to increase your sand bed as it will come live over time.
Use buckets/tupperware to transfer everything. It's best if you can have the new tank set up at the time of transfer. That way you can move everything one at a time and don't have to worry about moving everything at once. I didn't loose a single tank inhabitant by doing that.
When moving the sand, the water will get REALLY cloudy. Have an extra HOT filter for a day or so to help clear it up.
Have plenty of water mixed up in case you need to do a water change. Monitor your parameters closely for a week or so.
I just did this recently and followed a similar procedure. The only difference was that I did not set up the new tank prior. I used a lot of water from my old tank so I had to do break down the old and set up the new in one day.
1) fill new tank with enough water to cover your rock,
2) add rock then sand, (this will help your rock structures to be stable)
3) fill rest of water and start filters,
4) add fish and livestock
If you have bio-balls, keep them submersed in a bucket with an airstone to preserve the bacteria. The fish should be okay in a good size plastic bin with a powerhead for circulation. Good luck.
:happyfish :happyfish