Two things I would like to comment on -
The filter in the Rio 180. The manufacturer says to change the media (the stuff inside the filter) every few months. Don't. This is to get more money out of you. Sponges only need changing when they fall apart or won't go back to shape after squeezing. Just wash them in water that you've taken out during a water change. If the filter comes with cirax, that needs changing when it crumbles to dust. Just swoosh it in old tank water.
If the filter contains a green nitrate sponge, it doesn't work to remove nitrate. just treat it the same as a blue sponge.
Shops - don't believe anything they say till you've researched it for yourself. So many shop workers don't know or don't care and will say anything to make a sale. They don't believe in fishless cycling, for example, which is something we always recommend on the forum. While the tank is cycling, you can visit shops to look at fish - but ask on here or look the fish up on http://www.seriouslyfish.com/knowledge-base/ before buying.
One tip for using pet shops, do a little research about what your looking at. Then a few standard questions and when they are relaxed an chatting drop a few questions that may be species specific.
Then see if they stumble then admit a lack of knowledge or just run straight into a diatribe of complete tripe.
As example, this afternoon i picked up some bamboo shrimp, they had them listed as wood shrimp. I asked for the bamboo shrimp, they had amano's and cherries. She went straight to the correct tank, and commented (quietly) on them being hungry as they are nearly impossible to properly feed in the shop.
Not iron clad guarantee of deep knowledge, but she definitely understood the stock she had.