looking really good.
I don’t think you need to go to 400’s your tank is no that deep.
I would like to see the pH a little more stable and higher, it’s not really an issue but a refugium running at night or pH controlled kalkwasser dosing could improve that.
Did you get the m58 or m80 ballests? Radiums will run very nicely on a m58 but you are likely to start having problems with them not fireing around the 6 month mark. If so, send them to me, there’s still another 6 months of good life left in them on a M80 and I’m cheep.