PO4 and Micros dosing dilemma.
I've read in many places that Macros and Micros should be dosed on alternating days because PO4 from Macros can react with Iron from Micros.
What should I dose right after a water change? Because after a water change the system is low on both, Macros and Micros but I can't dose both at the same time.
What do you guys do?