5g going on 17g Tank

[syncro]

Here is my first venture into a reef tank. Advice welcome. I am really keen on the ADA 60-P, a 17 gallon rimless low-iron tank. However they are difficult to obtain so I've started with a 5g in the meantime. This also gives me time to figure out plumbing, sumps, ATOs and all the other bits.

Tank: 5 gallon glass tank
Lighting: Evil Par38 14k LED bulb in an Ikea fixture
Live Rock: Marco Dry Rock and misc donated pieces
Substrate: CaribSea Bahamas Oolite sugar fine (10lbs)
Filtration: Tom's Mini Internal Filter with filter floss and Marineland BlackDiamond carbon
Circulation: Vortech MP10 wes
Heater: Marineland 50w
Stand: Ikea Effectiv reinforced with plywood
Water: BuckEye Field Supply Premium 75 gph RO/DI

The tank is cycling. Ammonia just hit zero.