I am sorry for your loss. I have read up on your setup, and before you get your rays may I recommend that you install a large sump (approx. 55 gal
+) underneath your 125. In order to provide the tank with adequate biological filtration you need about 75-100lbs. more LR
. Since your going to be keeping animals with delicate skin, keeping this in the tank is a no go, that's where the sump comes in. If you build a 4 section sump (section for intake,then skimmer, then LR
, then return) You can get a quality in sump skimmer, pile in the LR
, and keep your DT as open as possible for the rays.
Here is a 2 part video on how to construct a sump on youtube, hope it helps.
YouTube - Reef Tank D.I.Y. Sump part 1