4 week Holiday. NO water changes???? opinions??

[atcguy]

I am an experienced reefer but need some advice from other experienced people who have gone through this. My 120 SPS reef will be on its own for 4 weeks for the month of June. Other than neighbor coming in to feed the fish I would like to not have him (not experienced) go through the hassle of attempting my tanks transfusion (ie water change)

I have the works calcium reactor , kalk mixer all running off my aquatronica controller. I just want him to be able to come in. press my feed button , which turns off everything for 10 minutes , feed my fish and let everything turn back on after time. he will change my filter sock 1/2 way through and empty my skimmer overflow aswell. My question is I do 22 gallon changes every 2 weeks normally. I have done 2 changes the past 2 weeks just to attempt to really get my water primed for when I go away. Anyone see a problem . I hear some people never do changes or very rarely???

I have zero nitrates, phospahtes 0, cal 465, alk 8, mg 1350, sal 1.026,

i think I should be fine but any opinions.