Ok guys new to the hobby got me a 90g cube sca pnp system started cycle with one raw shrimp for 3 days then feed my invisible fish for three days seen my ammonia spike then on oct.16 started the 7 day seachem stability bottle did that tested my water here and there watch my ammonia drop and nitrite raise and stayed there for a couple of weeks then yesterday I was going to dump a bunch of bio-spira in the tank to help build more bactiria but before I tested the water and everything was at 0 ppm I double check the nitrites and was still at 0 ppm so of corse I ran to the pet store return one bottle I got and pick me up a clown fish so later that night i added a 3 oz bottle of bio-spira in the tank and since i have had the light running over the last week i have noticed spots of algae here and there but u can see the change in color of my rock now it was all dry rock to start so I would like some help with why am I showing no nitrates last night and tonight tested and was a 0ppm is it because the algae is taking it all in so I would like any help with that and I was checking everything today and notice tons of copepods all over the glass and bottom of my tank still a b.b. but I have no idea where they came from maby the seachem or bio-spira idk and i have not added any thing from an establish tank any idea where they came from thanks guys