Need help with my rodi!

[bryan:))]

Recently i bought a rodi system from a fellow reefer, its not the traditional rodi kind.
Basically i just need to connect the tube and compartments together. Was like legos.
Served me well for the first time. 0-3 TDS

But the second time i used it my TDS jumped to 44, water also came out slower (200GPD but produced around 5 Gallons in 4 hours)
The time between the 2 uses was about a week if it matters

just wondering, is the problem with the filters or whatever it is

for your info, my city water is sitting around 45 TDS

 

[I never finish anythi]

Did you flush the membrane??