water changes?

[Arno]

I know it is a pretty old topic But it am stil interested and have a few questions ?
Know water change how wil it work out in a fowlr tank ?
Easy corals like Kenya Xenia do the need trace elements ?
Reason why I am asking because next year is going to be a bit more busy year than this year.
Currently have vaccination and i am setting up my juwel trigon 190L 50G whit probably a 25 gallon sump.
And I am hoping to set it up for low maintaince.

[SantaMonica]

Trace elements are provided by the food you feed. Kenya and Zenia should do fine. You can do no water changes if your scrubber is working good, and you have snails, crabs, etc for cleaning.

[Arno]

Wel then I am going to do that I will sel my corals that I can keep my calustrea have to leave then en my hamercorAl
.