Tank switchover

[Proteus]

The only thing I would question is how old is it. I can't see it having a long term shelf life. Even zeo product have BB date

Depending on how much rock you have you should be ok for bacteria culture

[freddy]

I just switched my 46 to my 75 took 4.5 hours,did a couple water changes days before the switchover and kept it heated and airated so I would have some extra water for the changeover that would be the same as the tank,worked good no losses or minicycles.

[Proteus]

+1 on saving water

[jonn46]

I actually have two bottles of it, the second I just picked up yesterday but I will check the date now that you mentioned it.

I have a small refugium full of rock and algae lol plus lots of creepy crawlies. I have quite a bit of rock currently in my tank but I also have been picking up more and I have it soaking in a 15 gal with circulation and a heater.