question about setting up a 25 aquapod

[Scoobaman17]

My boss wants me to set up a 25 aquapod for him, I was wondering if there would be a cycle if I used 25 gallons of water from my own established tank? I have a 100 display with a 50 sump at about 100 gallons total. Thanks! Sorry never attempted this I'm sure it's an obvious answer I just want to make sure.

[jflick345]

Yes, as long as you add LR or LS. Not much of the beneficial bacteria is found in the water column so you'll need established rock or substrate still to cycle the tank. You may as well just use fresh SW. People generally reuse water if it's a tank connected to their system and they're trying to match water chemistry or if they're moving everything to another tank.

[bertoni]

Whether there's a cycle or not depends on the amount of dead organic matter on the live rock. Using water from your tank won't help, although it might transfer diseases.