20g High setup - first saltwater tank

[604reefer]

So...I started my first SW tank last weekend! Aside from bettas as a kid I've never had a tank, but I've always wanted one. I know it's not the best to skip fresh and go straight to SW, but I tested pool water as a summer job for 5 years in a row and know a fair bit about the need for proper water chemistry. Right now I am running:

- 20g tall, 24" x 12.5" x 17" (approx)
- 15lbs live rock
- 20lb Caribsea Arag-Alive Fiji Pink Substrate
- Hydor koralia 425gph powerhead
- Aqueon pro 100W heater
- Hydor nano slim skim nano (23-35g)

I'm going to buy a light in the near future, 3-6 months, to add some softies and LPS.

Today I got a reading on the nitrates, but have yet to get any reading on ammonia or nitrites. I am going to add a shrimp tomorrow to see if I can get an ammonia reading.

I notice there is a dusty looking film on the surface of the water, and neither my protein skimmer or powerhead pointed at it will seem to dissipate it. I'm not sure what that is, but won't be adding livestock for a few weeks and not too worried about it right now.

I'll add some pictures as it progresses! It's been great reading all the posts as a lurker!