I setup a new Marineland Contour 5 gallon tank, using gravel from an established tank (rinsed with conditioned water). I also used plants from that established tank, and some filter floss from the filter. Then I added a new bag of ceramic bio-media in the rear sump area with a capful of bacteria blend dumped over it. 2 days later I did a 75% water change because of the dirt leaching some nutrients under the gravel. Added more bacteria solution to the ceramic bag and waited a few more days, did a 25% water change and added more bacteria blend to the tank. It's been 2 more days and I still have no ammonia, nitrite, or nitrate readings. I am using a heater @ 78F so I am just thinking I will not detect spikes. So I introduced a little bit of Excel today and Flourish Comp. I have waited off on adding any Purigen yet, I think after almost I think 10 days I may be good, I can possibly add my clean up crew now. The only thing I really have is a Betta fish that I built this tank for and I really want to put him in it what do you think? I used both test strips and liquid tests to verify.