Water Change

[scubachris]

I have a 29g. I need to do a water change to bring up my calcium. If I were to do a change of 50% would that cause the tank to cycle again?

 

[zman1]

Is it still in cycle? If not, no it wouldn't cause a cycle to start.

 

[lion_crazz]

No, definitely not. Just do not disturb the biological too much.