I have a question regarding what media filter I should be getting for an extra cannister. To explain the situation: I recently bought a new BRS 4 stage unit (left), and will be attaching my old single cannister from my old unit to the new 4 stage unit to make it a 5 stage unit (right).
The new 4 stage unit is on the left, and the old DI canister on the right. Through BRS and others suggestion; I am going to add this old DI canister onto the 4 stage unit, and make it a 5 stage. I will remove the contents / media of the 4th canister (the color changing DI resin), and put that in the old extra canister as the final DI segment.
My question: What should I put in the empty 4th canister from the new unit after I take out the color changing DI resin, and put that in the old 5th canister? Should I put in another 5 Micron VOC Chlorine Carbon Block, or just a 5 Micron Universal Carbon Block? There are also the 1 microns, but I assume I should be avoiding those.
I hope I did not make this more confusing! If so I can try to re-word. I added the photo below of the new 4 stage unit, and old canister next to it.
![RODO.jpg RODO.jpg](https://www.reef2reef.com/data/attachments/3422/3422389-8e67f180731cf4b3246ee571dec44f07.jpg)
The new 4 stage unit is on the left, and the old DI canister on the right. Through BRS and others suggestion; I am going to add this old DI canister onto the 4 stage unit, and make it a 5 stage. I will remove the contents / media of the 4th canister (the color changing DI resin), and put that in the old extra canister as the final DI segment.
My question: What should I put in the empty 4th canister from the new unit after I take out the color changing DI resin, and put that in the old 5th canister? Should I put in another 5 Micron VOC Chlorine Carbon Block, or just a 5 Micron Universal Carbon Block? There are also the 1 microns, but I assume I should be avoiding those.
I hope I did not make this more confusing! If so I can try to re-word. I added the photo below of the new 4 stage unit, and old canister next to it.
![RODO.jpg RODO.jpg](https://www.reef2reef.com/data/attachments/3422/3422389-8e67f180731cf4b3246ee571dec44f07.jpg)