The membranes don't last forever. They normally are rated for a certain number of gallons, and then it's time to replace them.
If you look at the manual for your device you can look up how often you're supposed to change the membrane cartridge. Your manual is probably available online if you can't find it. I always download a PDF of the manual for everything I buy, so I don't worry about losing it.
I don't remember whether you have a water analysis. You might not need an RO unit for growing most orchids.
|
greenpassion 
Threaded Mode
