Proper way to upgrade to bigger tank

[Jayson Ledbetter]

im switching from a 45 gallon tank to a 100 gallon. Will be adding 60 ilbs of live sand to the new tank then everything else will be coming from my 45 gallon even the 40 pounds of live sand that's in it now, if I add all my live rock, sand and water from my 45 will there be any type of cycling?

 

[Jisko]

adding a new sand bed then seeding it with a few cups of your old sand bed might be a better option.

When I upgraded mine from a 10 to 20 I had little to no cycle. When I upgraded from a 20 to 50 that's when I hit some what of a cycle. I'm far from an expert but that's just my experience

REMEMBER... post pictures of the new tank

 

[Texas Reefer]

Only use a cup or two of old sand. Using all the old sand, even in a bigger tank, will release too much crap and you would be battling algae for years. Trust me. I moved a year and a half ago and got a bigger tank, from 90 to 120 gallons. I drained the 90 of as much clear water as possible and used it in the 120, along with the 90lbs of rock and a couple cups of the old sand. I moved everything within a few hours and lost nothing. I had no noticeable cycle, though I did not test.
I also moved a 14 gallon tank, and although I did not change much in it, just moving the tank and disrupting the sand (which I hadn't changed) caused a hair algae outbreak from which the tank couldn't recover. I had to break it down and restart.
So, you'll do a great job, it'll be great, just don't reuse much sand.

 

[Jayson Ledbetter]

Only use a cup or two of old sand. Using all the old sand, even in a bigger tank, will release too much crap and you would be battling algae for years. Trust me. I moved a year and a half ago and got a bigger tank, from 90 to 120 gallons. I drained the 90 of as much clear water as possible and used it in the 120, along with the 90lbs of rock and a couple cups of the old sand. I moved everything within a few hours and lost nothing. I had no noticeable cycle, though I did not test.
I also moved a 14 gallon tank, and although I did not change much in it, just moving the tank and disrupting the sand (which I hadn't changed) caused a hair algae outbreak from which the tank couldn't recover. I had to break it down and restart.
So, you'll do a great job, it'll be great, just don't reuse much sand.

Thanks for the advice, never put much thought into the old sand , I'll definitely just use a small part of it. Just want to make it as less stressful as possible on my fish and coral