Twinz

I am setting up my 40 gallon and I already have a 29 gallon cycled. I will be transferring all my fish from the 29 gallon to my 40 gallon. I am going to sell the 29 gallon. I want new rocks for the 40 gallon, so can I just hang some of the rocks from the 29 gallon in the 40 gallon to help cycle it faster. Also I bought the 40 gallon used so I filled it with water for a couple of days to make sure there were no leaks. Can I just treat that water and use it or do I need to empty it and put new water in? Sorry for so many questions, just want to get things right. Thank You!

angelfish220

Yes, transfering the rocks works.

I think that you could just hook up the filter and treat the water and it would be fine, but dont take my word for it

COBettaCouple

You could treat the water, then transfer the rocks over and get the filter running. Then acclimate the fish.