Looking to get feedback for anyone who is using the DOS from Apex to perform continous water changes. Looking to do about 1 gallon per day. I'm looking into the renew pro from genesis reef systems as well but would then need to shut off my Tunze osmolator which would require me to shut it down from a controller (which I currently do not have). Looking at buying the apex gold package and adding the DOS module versus getting the apex junior, and using the renew pro. Any thoughts?