- Mar 9, 2015
I have recently got the Reverse Osmosis RO+DI Filtration POQ-4B-100 and am wondering if anyone else has used it? i read one, and only one, review where the person said it started producing ammonia after four months. This was after purchase, but most of the reviews were 4+ stars, but not all reviews were for aquariums. Greatly appreciate any info or insight if anyone has used this filter, link is here if needed.