Hey guys

, I've been lurking around here for some time and I want to show you my system that has been running for 3 weeks. It's got a 15 gallon FT and I can't say for sure how much volume the GB holds.
Here's some pics
Attachment:
1.jpg [ 60.31 KiB | Viewed 1541 times ]
Attachment:
2.jpg [ 94.34 KiB | Viewed 1541 times ]
Attachment:
3.jpg [ 44.88 KiB | Viewed 1541 times ]
Attachment:
4.jpg [ 26.14 KiB | Viewed 1541 times ]
Attachment:
5.jpg [ 102.14 KiB | Viewed 1541 times ]
Attachment:
6.jpg [ 114.4 KiB | Viewed 1541 times ]
I've been fishless cycling and from what I've read, it's supposed to take 4+ weeks before I see any nitrates show up but a couple of days ago I saw some Nitrates appear though I'm not so sure I should be jumping for joy just yet (thought I'd show you guys to get a second, educated opinion).
Attachment:
7.jpg [ 32.35 KiB | Viewed 1541 times ]
What do you guys think? Should I count my system cycled and start adding a couple of goldfish once Ammonia drops to zero for a couple of days?
The seedlings you see are monggo beans I just added to see how they would do. Sowed some Cherry Tomatoes and Bell Peppers directly into the GB and I have Pai Chai, Cauliflower, Tomatoes, Okra and Chillies in seed starting trays made of recycled plastic egg trays.
Is anything wrong with my setup? I plan to make a larger system along the fences if all goes well.
Thanks guys!