16" Finnex Fugeray. Pretty unhappy with it but it does the job decently. (Details about it here in my 45-F journal.) I built a DIY LED fixture but just haven't gotten around to putting it on the tank.
Nope, no ferts. I've tried ferts in the past with mosses and Fissidens with no real noticeable improvement over time. The only time I see a benefit is when using pressurized CO2. Other than that, it all grows really well with just some lighting and clean water with lots of shrimp to keep it picked clean.
The 10 & 12 inch units are fine. It's the 16" unit that's basically a rip-off - even if it's just a few more bucks - because there's all that dead space. The 20" is also pretty nice, even if colors are a bit washed out.
Yep - definitely from the river. And from the awful water company that pretends to have amazing water. (While folks all over the city regularly detect 80PPM nitrate and 3-5PPM ammonia)