Reservoirs in flowering room

Lets say there are 4x 8' fence post sections being flooded and drained in the flower room. Each post represents 2-3 weeks of growth, so they are finished in 8-12 weeks. how would the reservoirs be set up? would each tube be hooked to a different reservoir? which is the best way?
4x reservoirs- 4 nutrient strengths (the last one with no nutes for flushing)
3 reservoirs- #1 transition to bloom, #2 (filling 2 tubes) strong bloom mix and #3 reservoir for flushing in the last tube
2 reservoirs- 1 strong bloom mix reservoir to fill 3 tubes and a second reservoir for flushing in the last tube.
Im confused as to if there should be different strengths for each tube in the cycle. The plants will rotate to the next tube after its 2-3 weeks and so on. What would your idea be for 4 stage flowering? and your reservoir settup if using 4x flood tubes?

When plants are 2-3 weeks difference in growth they have different nute needs and different pH needs. Separate res for each stage or you will see issues and have yield loss.

https://www.rollitup.org/blogs/blog27669-reference-guide-harvesting-1-pound.html in this reference guide, he has 3 stages, i think all with the same 2000 ppm from what i gathered. but yeah, i was thinking the same thing. different nute strengths. maybe if anything,
so: tube 1= trasnsition to bloom, tube 2 bloom, tube 3 ripening and tube 4 almost no nutes at all. Sound right?

Honestly not many people ever ran that 2000ppm recipe from stink. Way too strong.