Define planted tank? Low tech or high tech with co2?
Define specific killi and plants?
But agree with all you really need is equilibrium.
Niloc Thrive is a good AIO fert option and way better price to dosing ratio if your just keeping plants in a low tech, no need for 2 part solution really, just dose usually 1/3 to 1/2 strength on daily or every other day schedule. KISS philosophy dosing.