Can I use a Hydrocarbon Removal Matrix Filter Cartridge as prefilter

[Jyetman]

I have a box of 10 shower filters I bought at a thrift store never used. Can I install this filter inline to my RO system? The spec sheet says it contains activated carbon and HRM which I assume is Hydrocarbon Removal Matrix. Is it safe to use as drinking water and with fish?
https://www.dropbox.com/s/2ong7s2fu5bl2zm/IMG_6774.JPG?dl=0

 

[Pet Detective]

I don't see why not, it certainly will not hurt anything. I would put it inline after the sediment filter and before your current carbon block.

I'm sure it's safe to use for drinking, especially since we drink straight out of the tap and for sure it won't affect the fish water.