wave maker question

[seatrueblue]

I just got my first tunze wave box last friday. It is for my 120 gallon.. It looks great, the wave motion is really cool. My question is ..Can the water quality go down for a while after introducing a wave maker to a system? I think its because its moving water in spots where it wasn't moving much before. My corals aren't looking so great ..as in they aren't extending their polyps as much as before the wave box was put in. We are always doing 10% water changes weekly. I'm begining to think I should do an extra 5% this week. Has your water quality gone down after adding a wave box? The fish seem fine just the LPS and softy corals aren't looking happy.

btw..this tank has been running for over a year..with just regular cheap power heads at first, then upgraded to koralias and now a tunze wave box.