Reef nutrition

Fridge filter water


Supporting Member
Wondering if the fridge filter remove gunk similar to a RODI. I changed two fridge filters, used a TDS meter and found both read the same as kitchen sink faucet = 320ppm.

My RODI water is close to 0 ppm.


Supporting Member
They are definitely not the same. The refrigerator has a carbon filter only.
I check my refrigerator water with the carbon filter on and it drops tap water TDS of 35 down to TDS of 21.