Dosing is standard EI but smaller amounts. So, every other day I add nitrate and phosphate and on the in between days I add the micros.

Measuring is totally an estimate in this too. I actually just grab a small pinch of KNO3 between my thumb and index finger and sprinkle it in the sump. Much the same with phosphate but just a couple of particles. For traces I'm using Kent chelated iron. It's specifically for macros and contains a few other elements. It is a really weak solution though. I just follow the instructions and go for 8 drops per 50 gallons.

So far I couldn't be happier except for a serious hassle with diatoms that lasted about three weeks. It cost me half of my manatee grass because I couldn't keep it off them. My pistol shrimp is making it hard to keep the rest rooted.

Next stage is to think about how I want the tank to look for the long term. Some of the caulerpas will stay but mostly I'm just going for growth and balance. Trying to get a feel of how it is in the world of SW plants, and how can I apply EI to a setup like this. No complaints so far but still early days.