How would you guys do this?
Going from a 29 Biocube to a 60G Cube?
I have about 20-30 lbs of LR in the 29G tank.
My original plan was on one day take all the water/LR/corals/fish out of the biocube and put them in the 60G with new water and about 30-40lbs of "cured" LR from the LFS.
Do you think this will work? Will I loose all the corals/fish? Will the new tank cycle?
It should be like a large water change.
Many people do a tank transfer in a single day by removing their rock/coral fish to bins and then assemble them back in the new tank.
A few things to keep in mind:
1- the new 'tank' itself, along with it's plumbing will have a small cycle as the surfaces become covered in bacteria (remember there is little bacteria in the water column itself, the majority of it is ON the surfaces of the rock/sand/tank itself). So you want to continually check your ammonia/nitrite levels and react with an immediate water change if you see these rise!)
2-If you are going to use new water in the new tank, you will want to acclimate your fish over to that water as it may not have the same parameters as your prior tank.
3- The 'live rock' some LFS's sell may not be as completely cycled as you'd like it to be. Some stores continually add new deliveries of live rock to their existing bins. Therefore those bins may be in a continual state of 'cycling'. You may have no way of knowing if the particular rock you chose went into that bin a week or a month ago. That said - there ARE some stores that keep different bins of LR and KNOW that some is fully cycled - THAT is where you want to pick your new rock from.
4- When you transport the new live rock home, do whatever you can to do so quickly (so it stays warm) and keep it as submerged in water if at all possible at all times. Even a few minutes out of water causes die-off and that is what you want to avoid the most in your tank upgrade.
5- Do be sure to have extra heaters on hand to keep the fish/corals/rock warm when changing the tanks. Water at room temperature cools off very quickly.
6- Be sure to have plenty of new water ready to go before you start.
7- You will want to check your parameters in the new tank on a daily basis - as mentioned above - to make sure there is no ammonia spike
8-It will take twice as long as you think to do the switch over
You didn't mention sand - are you using your prior sand bed or replacing all or part of it?
How long has the 29g tank been set up?