Add some Koralias/Seios/Tunze Nano Streams/a Vortech pump in there -- you need more flow than your return and skimmer. At 3 months -- you're definitely still going through tank cycling... while the nitrogen cycle may have run its initial course, the tank is still maturing chemically and biologically -- there will be a lot of wax and wane for the next 6 months. Just keep up on the maintenance, and add some flow in there. I recommend a Vortech -- you've already got a sweet ADA tank, keep it as minimal as possible

Edit: Unrelated -- but what did the Amano Designs tank run you? I didn't know they were readily available stateside -- they sure are gorgeous.

-Justin