keeps the baddies out of your system, and is a necessary step. Get a cheapo 10 gal
tank and an airpump or powerhead from the LFS
. After you do your initial setup, anything you buy goes in the QT
for 4 weeks. Thats how long it takes most parasites and diseases to die off. They are also helpful if you have a sick fish. You never put meds in your main tank, so a QT
Live sand has lots o' beneficial buggers that help keep your water stable. It is a substrate material that you put down instead of gravel. Get enough to cover your tank bottom 2-3 inches.
The powerheads are for water flow. You have to have a decent amount of water moving in the tank to keep all of the critters in the LR
happy, as well as any corals you add later.
water is purified water. RO
stands for Reverse Osmosis, DI
is DeIonized. If you use tap water, you are prone to a lot of pest algae. Use the filtered stuff. It's much better in the long run.
You will eventually want to toss the Biowheel filter, as the LS
will take care of your chemical filtration. The only thing you need is a mechanical filter (something to get rid of the suspended dirt and dust in the water) and a protein skimmer.
I would really take a few days and spend some time with a LFS
guy that's willing to walk you through what you need to do with a SW
setup. It will save you a lot of money and a lot of heartache down the road.
Basically, you need to decide what you want to put in the tank - fish only - fish only with live rock - corals - etc. That will determine a lot of what kind of equipment you need to get, as well as what needs to be in the tank before hand.
Hope that helps a little.