Re: Dosing pumps
I mix the macros together, and keep the traces separate.
So I have two dosing pumps as describe by Gillman.
If you have a central filtration system ona multi tank system, then the dosing pumps and CO2, monitoring equipment etc are well worth it.
I use a 4L jug
You can dilute the amount of nutrients down to whatever concentration you want, I typically dilute the traces at 60:40 ratio of Trace: DI water for my routine.
I dose the traces daily and macros as well but with 12 hour splits so they are dosed 12 hours apart.
Few timers will dose every other day for 1-10 minutes etc and there's no issue dosing daily with automatic dosing

!!!!
Plus with a 12 hour split there's no mixing.
You can hook up a solenoid to switch reserviors using
one single dosing pump and Tee.
Ahhh.........
Regards,
Tom Barr