Sorry I've only just found your thread on this
@sirrealism
@Snelly40 is pretty much on point here
You only need the basic four(five) to start with, being:
- stones (heart of the operation)
- zeobak (bacteria source)
- zeostart (carbon source)
- spongepower (sponge and clam food, helps with nutrients)
- And finally an activated carbon, one that's not strong so matrix, rox or KZ carbon will do the job well
Food7 is a no-no as it's a nutrient and amino source designed to add back to the system but is only necessary when you reach true ULN, so in the beginning it only causes problems.
For you and I, I can't recommend sponge power enough! It grows sponges in your tank like crazy!! My sponge population tripled in less than a week after starting dosing again after running out lol and clams seem to love the stuff as well!! I love my clams so most things are done for their happiness and sponge power is a big one lol.
The carbon should be run passively in your sump as you don't want it stripping too much from the water but if you do want to run it in a reactor a slow tumble with a lower water flow is best
Given that your system has been running for several years now, you're going to have to take zeo slowly and be patient as it may take a few months before things really start to change but you might start seeing small changes in under a couple of weeks.
The first month and stone change is crucial as if you come in too aggressive things will go south quickly! For the first stone change and potentially the second depending on where your system is at with it, the recommended thing to do is run the reactor pump 3hrs on and 3hrs off so that it slowly introduces to the system. This IMHO is a pain in the bum! I didn't do this when I started zeo on my tank that was a year and a bit old, instead I bought a small variable speed pump and started off with half the recommended flow going through the reactor 24/7 (150lph) and saw no ill-effects from that. Then after the first stone change (50%) I bumped the speed up to 3/4 (220lph) of the correct flow and once again that worked well and finally when the third round of stones were introduced (80% change) I went up to full correct flow (300lph) and everything was happy
If you have any questions on anything about zeo ask away! Here or anywhere else