Ok, I began a fishless cycle 3 weeks ago. I added filter from my 3 gal tank to my marineland 360. I dosed to 3 ppm ammonia and waited. I got a drop to about 2 ppm in 2 weeks and then got impatient. I tested water and had 2 ppm ammonia, 0 nitites and 20 ppm nitrates. Yeah, weird i know. I...