I have the bulb in a gooseneck clamp lamp that I have clamped on to the shelf above my desk. I find that the problem with the stock JBJ light is that if the water level is too high, the water will start to be pulled out by the annulus created between the glass and the plastic clamp due to capillary action.
For filtration, I'm using a AC 70 modified to reduce flow, I also have the heater in there. You can see how to modify the AC 70 on many nano reef forums.
I haven't seen the need to dose ferts yet, however I do dose flourish excel even though I have a diy CO2. The flourish will keep algae at bay.
When the algae was getting bad, I was dosing 2 mL/gallon for a week, then I stopped for a week, then all the algae died like magic, now I does 1 mL/gallon once every two days.
I feed the shrimp 2 Hikari crab suisine pellets once per day.
I top off every day with fresh water that was filtered with a Brita because evaporation is about 1/2" every day.
When I go away on weekends, I put saran wrap on the whole thing. It does wonders.
Good Luck, I love this little tank. Hope this info helps.