Turn your NFT pump full on and 24/7 on
root rot is more prevalent in occurs in systems that run slow
increase the angle of the slope stops nutrient pooling
thats about all you can do an it should be fine
Where in the world did you get this misguided obsession with flow rates and root rot? Flow rates have exactly nothing to do with root rot. Zero. Zilch. Nada. Nothing at all.
You also have a major misunderstanding about NFT systems. The 'F' is NFT stands for film, NOT flood.
When done correctly, NFT is designed to have a very minimal flow rate. You only want the barest minimum of water on the roots - a FLIM of water, not a flood of water. You dont want the roots to dry out, but flooding them defeats the main benefit of running NFT.
Root rot, or any other bacterial or algae infections are primarily caused by too high temps, poor rezervoir care, allowing light into the rez, and use of organic based nutes.
Increasing or decreasing flow rates has exactly zero to do with it.
I’m 8 days into flower nft 424 ,train crash 4 plants ,at the moment they are doing fine now ,I left my loft torch on top of light,anyway removed ,they are looking well,got my nft pump still on slow trickle,worried about root rot ,heard some people put a piece of wood under the pump end to stop any puddles ,at the moment they doing fine,thinking off putting piece wood under pump end,would you recommend doing this? Cheefs
Your plants look happy to me.
Have you looked at your roots to see what they look like? Do you see any signs of root rot? Do they smell?
What are your water temps in the rez?
What nutes are you using?
Are you running a sterile rez or using beneficial bacteria?