I recently switched to the modern reefing proportional consumption method and couldn’t be happier. The “baling” itself contains both traces, aminos etc and you round it out with polypop for color/PE and the food for additional nutrition.
What I really like is that everything is based of KH consumption so it takes out the guesswork in dosing food for example (I hate adding arbitrary amounts of stuff based on nothing) and everything can be automated easily. My kh-director tests the kh and adjusts the doses of all additions to the tank automatically
At face value it’s probably the most expensive baling there is but since it cuts out the need for a bunch of extra stuff I suspect it works out to about the same cost as other methods.
The only annoying thing is that you can’t really run it simultaneously as for example kalk as that will throw of the addition of elements.
Taking my kalk offline made my overnight ph drop from 8.3 to about 8 and I prefer it to not drop below 8.3 so now I run a Co2 scrubber which does add some cost.