Leak is fixed!
Now if I can only find a way to fix SPS growth in this tank. It's very confusing.
Some SPS have good colour and growth while others are not so good. The weird thing is that some of the corals that are not doing so well are the same species as those that are doing fine. OK, so I move the ones that are struggling to the same spot as those that are thriving. Doesn't help. For example: 2 orange Digi frags that I fragged from the same colony at the same time from my 90 gal. One has grown nearly twice as much as the other and has much better colour. They are in the same area of the tank; same light, same flow. WTH!