Really. I don't test and don't wc on my 9 footer. Given it's only a few weeks old. Unless something die.
I'm more of reactive instead of proactive. Yeh I know it's bad practice and lazy. Bigger tanks can tolerate all the imbalances.
Can i add copper without any problem?
I set up a 20g qt tank and added a live rock from my display. It has been a few days and 3 fish are happy and eating (thanks @Apon)
I wont return rock to DT.