I have a 12g reef tank that sounds similar to yours. It has about 15 pounds of live rock, live sand, three different corals, snails, crabs, a fish and a cleaner shrimp. Here are a couple things that I didn't see you address regarding your tank...
- Do you have a water testing kit to test your water values? It took close to three weeks for our tank to cycle using the live rock and live sand. That is the ammonia and nitrites were 0 and there was a small nitrate reading. We use the test kit by API to measure the values. If you are at any time going to be adding corals you definitely need a kit to test for calcium and phosphates.
- Do you have a clean-up crew? After our tank cycled we started to get a small algae bloom which is completely normal. At three weeks we added a couple turbo snails and hermit crabs to clean the tank of algae. Since that time we have added a couple sand sifting snails that live in the sand bed to keep the sand aerated, an emerald crab and a cleaner shrimp.
- I don't know a lot about saltwater fish, sorry. The only fish we have in our reef tank is a six line wrasse. He is a great fish, tho, very colorful and active all day. You may want to look to see if this type is compatible with a clown. He is a great pest controller, too, and will eat flat worms and bristle worms if you end up with any hitch-hikers.
I'm sorry I'm not familiar with your brand of filter, as we have a self-contained AquaPod unit. We take out the filter material about every other week and swish it in the siphoned water when we do a water change to get out most of the debris.
There is a lot of good information on this site aside from the forum, too.
http://www.fishlore.com/SaltwaterBeginners.htm I have learned a lot from here - my tank is not even 4 months old yet. Good luck!
