Acclimate an entire tank?

[five.five-six]

I'm makeing a small upgrade from a biocube 29 to a 135 gallon peninsula, See my build thread.

Yesterday I did. 30 gallon WC on the 135 and kept the water and every few hrs I am doing a 5 gallon water change wit that water on the 29.

Once I have done all 6 15% water changes on the biocube, assuming the temp has been matched, will it be safe to just transfer fish and corral from one tank to the other?

 

[Maritimer]

Keep in mind that when you draw water from the 29 for the second change, you'll be pulling a percentage of the 135 water out as well as the old "29" water. At the end of your WC string, the water in the 29 won't be 100% 135 water - but the levels between the two may well be "close enough", depending on how different they were to begin with. If the salinity of both reads the same (preferably with a refractometer), you're probably OK to temp-acclimate and release.

~Bruce