If you don't figure it out, I'm a bit impatient. I got my 55 gal plumbed and running a week ago this last tuesday. I seeded the wet/dry with a used cart from the HOB filtering my 20g. I dosed ammonia once and have been checking it every day...ammonia level didn't move, no nitrites. I guess I forgot to the check the nitrite results last night because when I got home from work today I notices yesterday's nitrite test is reading 2ppm. Today nitrites are reading 5ppm which is high as the test goes.