I just replaced filters in my Coralife pure Flo 2 with booster pump. I bought used and replace filters in the positions they were in. Mum well water is 200 at the kitchen tap. I have a sediment pre-filter for the whole house. In the picture the canisters on the right and middle are both carbon the canister on the left is DI resin. I tested the TDI from both the RO water side and the waste watersde of the filter and they're both getting close to zero which makes me think the DI resin is in the wrong position. I can' find the manual at home or on-line. Any ideas? The yellow line on the right is the well water inlet line.