chemical reaction?

[mandarin man]

My main concern is chemical reaction from different brands of additive ie. kz AA reacts with brightwell replenish. If that not the case I will definitely add it slow.

Most people recommend doing water change as good source of trace elements. In a heavily stock reef tank, correct me if I am wrong, these traces are used up very fast, in couple of days... Therefore, I feel a need to supplement it.

So there is no one used trace element as additive?

Thanks