Water Management / Filtration
"Everything Should Be Made as Simple as Possible, But Not Simpler."
Vertex Alpha 300
I'm still a skimming newbie, but I believe that if my skimmate is closer to tea than to a thick sludge, the less issues I'm going to have with nutrients.
Libra Dosing Unit & Vessels for Alkalinity, Calcium, and Magnesium
Libra Dosing Unit
This unit looks great, easy to use, and are highly programmable. I got the cheaper motors. The pumps are very loud and noticeable, but you can program when and how long they come on so it has passed the wife test so far.
Libra Dosing Vessels
They look beautiful, they seem solid enough, and they have an adjustable air vent to prevent cavitation. But they have two problems: #1) They don't hold $*@*ing water, they leak. #2) They lose suction, so your pumps will just spin and not dose fluids. In summary you pay a premium price for a product that is capable only of putting fluids on your floor, and none of into your sump -- but hey they look really slick.

I fixed the leaking problem with super glue, and the suction problem with teflon tape. But I don't feel I should be doing this on a premium product.
Phosphate Management
Originally I started with about 4 cups of GFO in a media bag, but was still showing up to 0.10 P04 on a Hanna meter and nasty GHA. I believe I was just burning through the GFO quickly due to it being a newer tank and possible leaching from my Marco rocks.
Eventually I got a Vertex Ilumilux light the was designed for Fuges and threw in some Chaeto in the sump. It grew a lot, but ultimately I just didn't like the general nastiness of having slime and other stuff growing in that portion of the sump.
I got rid of the light + chaeto, and then switch to 4 cups of GFO in a Vertex reactor. My P04 is showing as 0.00 but I do get a little bit of film/nastiness on the glass on a daily basis. I've been running this for about a month, I might see if the results are same with a media bag in the next few months.
Nitrate Management
4 cups of BRS Biopellets from the start in a media bag, and my system has never show any Nitrate ever. I'm pretty sure reactors aren't required.
Carbon
2 cups of ROX Carbon in a media bag, appears to work fine. I think I'm fine without a reactor.
Mechanical Filtration
My system is lacking a sock filter which I could add at a later time. I could also add a sponge in one of the baffles.