4/20 Update:
The 120 is cycling nicely. Nitrites have fallen to 0 twice within 48 hours after ammonia dosing. Dosing to 1ppm ammonia when they fall to 0. CoralVue is sending me replacement parts for the gyre, as one of the rubber feet was not installed right, and the spinning wore down the pad, so now it doesn't grip and the one impeller doesn't spin. This IMO is a design flaw and should be addressed. Emailed Coralvue about that. If this happens again, I may look toward getting a pair of Vortech Quiet Drives for the tank.
The Quarantine tank is starting to kick in. The AC20 I had wasn't enough biological media IMO and that was causing nitrites to remain sky high. Used my
amazon points to purchase an AC70, and used the media from the 20 with the media from the 70...yesterday the nitrites had fallen to approximately 0.5 from well over 1.
The BioCube 29 is in the same process, just waiting for nitrites to fall, but there's no rush as until the QT is ready, I can't really get fish.
Picked up the Tunze 3155 ATO yesterday for $100. Took a while to realize that the tube needs to be higher than the water level in my storage bucket, because it'll siphon in if it's submerged. Had to angle it towards the side glass so it was quiet.
I also completed the bottom part of the tank stand. Added top trim and corner moulding to it. I have 1 more coat of poly to apply, but really happy with how this turned out. Not perfect, as the top piece is approximately 1/8" short so the one corner, there's a lip to the side...whatever