Hello everyone! This is my first post on this website and I'm glad to meet everyone. I've been following a few posts here and there and learned that there was an app, which makes it a lot easier for reading! I am a new beginner to the SW hobby, after a few freshwater tanks that frankly got quite boring. Anyways, I started a Nano SW tank on Saturday, June 4th, 2016. At one of the LFS in my area, I purchased the following based off of information given to me by a store associate (who is also a hobbyist): -CaribSea 10LB Live Sand -5LB Aragonite Sand -Roughly 10LB Live Rock (Indian Ocean) -10G Imagitarium Pacific Ocean Water -(1) Aqueon 500 Powerhead -Fluval 50 HOB Filter -API Master Saltwater Test Kit -(2) Blue Damsels PS: I already had a 10G tank; (2) small-sized heaters [incase one stops working- I read somewhere it's good to have two heaters just incase one malfunctions and the other will kick in].; National Geographic LED Lighting. A few days after, I purchased my clean-up crew (as recommended by another hobbyist at a different store). They are as follows: -(1) Scarlet Red Hermit Crab -(1) Emerald Crab -(1) Turbo Snail -(2) Blue Legged Crabs Here is my tank setup as of now: I have been measuring my parameters roughly within two days. Here are my recordings: **I highlighted parameters that are unconditional in blue. I know my parameters are pretty high and that it is currently going through its cycle, but on the first day as you can see all parameters were just fine. I have been using Kent Pro-Ammonia Detoxifier, pH Buffer, and Essentials for chemicals to try and help fix these readings, but no luck. I have done one water change as you can see on my recordings, and it was 50% with the same Imagitarium Pacific Ocean Water. I would like to make sure that I am doing this right, as I said before this is my first SW tank setup and I am completely new to this. I am only going off of what I've read from this forum and what hobbyists are telling me at other aquatic stores locally (Silicon Valley). I would also like to add that within 4 days of my initial setup, I sadly lost one of my damsels. I noticed very dark and full coloring while I was acclimating him, but instantly went away and became bright blue again when he was in the tank. My goals for this tank is to become a reef tank with SPS corals. No specific corals yet, and no specific fish yet either. Though I do love the idea of at least a bubble anemone with a corresponding ocellaris clown. And it would be awesome to have a mandarin goby as I think they are beautiful, but I'm not sure if my tank would be suitable for one. Another thing is I was looking into purchasing a slimmer and probably doing away with my HOB filter all together. Because my tank is so nano, I'm looking at the Reef Octopus NS80 HOB Nano Skimmer. The reason being for wanting a skimmer is because after only a week of an HOB filter, my media was extremely full and dirty. After all this information (it's a lot, I'm sorry), is there anything I am doing wrong? Is there any advice I can get on what the next steps are I should be taking? Advice on fixing these parameters? Tips of reaching my goal, or if it's even possible? What about the protein skimmer? Any information is greatly appreciated. Thank you all so much for the help. PS: I am also open to private messages if needed.