Two 40 watt UV, slightly undersized for the system, but our ozone is oversized and does a similar task.
Did I mention the ozonizer is oversized? It has a super cool built-in air drier with automated, heated recharging so no need to sneak the desiccant into Judy's oven to regenerate it while she is out

On top, we have the Profilux controller which will receive another round of upgrade parts on wednesday. We have the SMS text device that will send out any warnings to the brothers Grimm, brothers Shimoda, Peter, and myself atop Mount Olympus

We fit all of the wires into a black wire cover so no clutter believe it or not.
Yes you can run a Schuran Jetstream 2 calcium reactor as a fluidized bed calcium reactor. I filled it to the 1/3 mark and it rises to 2/3+ once it is running. The tiny grains of calcium carbonate float around, bump into each other and hopefully dissolve faster than standard large media. I need to slow down the pump a bit to make sure stray sand doesn't go through the pump, but the only place I can fit it is in the reactor without serious replumbing... and it's all metric

I ran it for half an hour and virtually no sand made it to the bottom plenum through back-flow or through the pump. I may just upsize the media notch and skip the control valve. Ignore the John Guest fitting on the top of the valve. I'm putting an inline 1/2" probe holder there when they come in next week. Fortunately, Schuran uses Georg Fischer fittings so my local imperial GF valve parts fit the metric ones from Deutschland.
Control panel that looks like it is out of an Apollo series rocket

At some point in time we will be linking all of these to the Profilux power bars to bridge the outlets around the room and the devices attached to them, with the Profilux controller.
Cross eyed view from inner corner on stair side.