HydroRocks
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Normally, when a system is healthy and setup proper, you should see a slight increase in pH as the EC/PPM levels drop slightly and this is due to the ion exchange (+h)......
Some different schools of thought I have seen in the UC system is to keep the top off tank at a level where the EC/PPM never drops in your EPI, but stays steady at what ever value you set it at....
Then another school of thought is to use only RO water in the top off tank or tap water if your using tap and then do a drain and fill every 7 to 14 days or when ever a certain EC/PPM level is reached.....
Then of course you have a "mix" of the above so to speak that some follow as well as complete custom nutrient packages, and feeding schedule. But they will all usually share some common core fundamental values of a RDWC type system......
You have a very NICE setup and grow there....keep up the excellent work!! You are on track for a really nice reward at the end of that rainbow, for sure!!
Remember how efficient the UC system is by design with nutrients in general, meaning it will always take a lot less than more......
Be Well
Some different schools of thought I have seen in the UC system is to keep the top off tank at a level where the EC/PPM never drops in your EPI, but stays steady at what ever value you set it at....
Then another school of thought is to use only RO water in the top off tank or tap water if your using tap and then do a drain and fill every 7 to 14 days or when ever a certain EC/PPM level is reached.....
Then of course you have a "mix" of the above so to speak that some follow as well as complete custom nutrient packages, and feeding schedule. But they will all usually share some common core fundamental values of a RDWC type system......
You have a very NICE setup and grow there....keep up the excellent work!! You are on track for a really nice reward at the end of that rainbow, for sure!!
Remember how efficient the UC system is by design with nutrients in general, meaning it will always take a lot less than more......
Be Well