Oh man, what an influential book that was!
You must be enjoying success if you're still mixing up laterite and using cables in your substrates...congrats!
The system has just been put on-line a few weeks ago, so I have no idea.... JAJA. I think it indicates a cowardliness on my part, a reluctance to try the newer active substrates from ADA and such... Falling back to old school methods that imploy an inert substrate... and of course doing it across the board because I have a common system...
Regarding Dosing... for the next month I'm just employing two liquid fertilizers from BrightwellAquatics for the system (FishNook is roughly 95-100gallons for all display tanks, sumps, uvfilter)... Florin-K (potassium supplement) 10ml twice a week and then FlorinMulti (iron/iodine) 10ml once a week for the system. All part of the break-in... As I learn I will mix my own solutions from dry ferts.. and employ my Dosers (2 x EZO-PMP from Atlas-Scientific) to adhere to a steady regimen (of course regimen never replaces observation and adjustment).
I really only want one set of variables to manage for chemistry..... The only variability I want in each of the tanks is the personality of the fauna...
I've had this book forever, and have lent it out serveral times. I recall one person was shocked that I shipped it across country for them to read/use for an entire month... when they sent it back to me the packaged contained a $25 gift certificate to a restaurant chain for my wife and I to express their gratitude. (yeah, you could eat out for $25 in the nineties) Fun stuff.
I'm running about 95% RO, 5% Tap. Seriously.
pH is 6.8-7.0 (some movement)
Temp is 27degC
KH is 1dKH (about 20ppm)
GH is 20 mg/L
Ammonia < .1 (barely registers)
my test kit is not extensive enough to measure elements.
I have pH, ORP, Conductivity and DissolvedOxygen sensors.... but I need to rebuild the DissolvedOxygen Probe and the ORP got accidently fully submerged (slipped out of it's cradle)... So, I'll learn to use that instrumenation to help me at the very least identify when I relative shifts in the chemistry/conditions (aka something is changing)... even if I don't understand the significance of the absolute values...