I don't know what you paid, but the buy/sell/trade section here is always rocking and rolling with great deals. I've found that bow front tanks run a little bit higher, but there are always deals. I've found the WAMAS forum to be a little slow moving compared to others, but much more rewarding and personal (I've meet many local reefers, all of who are willing to talk about/share the hobby, and pass advice along.)
I think this is the tubing you're looking for:
http://www.amazon.com/Loc-Line-inch-Ball-Socket-Flexible/sim/B001EHI1CM/2
For testing kits I use the API saltwater, and API reef kits. Like Jimlin mentioned above, a hanna checker would be nice. I also have a refractometer. It's becoming less time consuming as I move forward, but still a PIA. I've seen strips (just a dip in the water) and they are fairly reliable, although I'm not sure how pricey.
I threw a pair of Percula Clowns into my 14 gallon, they are fairly tiny, and I'll move them to my new build within the next quarter of a year. I would recomend them, as they are hearty, and personable... personable of course implying that they beg for food if I stand close to the tank. Maybe a gobby or two, if you're not worried about your sandbed. I'm sure people will chime in with better advice than mine. I find that if you post in the "new to the hobby" section, people are pretty quick to help!
Hows that clam doing, btw? When I get a bigger tank I might make the move on one!