Do reactors equal less water changes?

[mrhasan]

Originally Posted by LoJack

I think the question means:

If I am controlling nutrients already, such as a skimmer for nitrates, and GFO for phosphates, does a reactor contribute enough trace elements to extend the period between water changes.

I've often wondered this myself. If my nitrates are at 0, and my phosphate are .01 or .02 ... what am I doing a water change for?

I've heard of people adding magnesium crystals their calcium reactor media as well to help keep mag in check while running a reactor.

To add those "trace elements" that nothing but calcium reactors can provide only. Or unless you have a full balling system, gfo, heavy skimmer and some sort of nutrient export mechanism like biopellets or zeovit. Like zeovit tanks do wc to replace the trace elements only unless they employ something to replace that too through dosing or calcium reactor.