<a href=showthread.php?s=&postid=11915161#post11915161 target=_blank>Originally posted</a> by shyland83
My RO is good
RO still has a TDS reading between 25 and 100 ppm unless you meant RODI. A deionizer will polish off the the RO to a TDS of 0ppm. I use DI in my tank my roommate gets lazy and uses our RO drinking water. He has algae I do not.