I am not sure why they have it installed to be honest, but I did some digging today and this is what I found:
I have a GXRV10ABL01 unit by GE
It has a place for two filters
I know everyone said it won't matter but I did a PH test
from RO unit 6.0ph
from Tap 7.0 to 7.2
So I atleast know it is lowering the PH, I ordered a TDS tester to do the rest of the testing.
I have found the filters online for about 14 bucks for two. Can you post which ones from home depot I can get for that low cost? I also can't seem to locate the filter wrench, i'm guessing it is pretty necessary?
What is involved in backflushing the TFC? I can get 4 filters, and a new TFC for about 50 bucks online, might be easier to just replace it all. I have been reading the manual, the sanitising stuff looks fun, its in a TIGHT area under my sink so getting to all this is going to be a pain but I want to do CRS/CBS shrimp so I know the RO water helps alot in that area.
The only other issue is the tank is only like 1.3 gallons, to fill up my tanks would take forever, lol I'm not sure how worth it all this is.