Red Sea tests are usually pretty accurate - at this stage of the game you shouldn't have any ammonia or nitrite unless you're drastically overfeeding or if something is dead and decaying in the tank... I'd check that against another brand of test to be sure.
Hate to tell you - the wrasse probably won't last more than a week
That's one creature better left in the wild.
The dragonet - I'd return that to the LFS - they shouldn't have sold you that (or either fish really... and I'm a LFS owner!). Both are inappropriate for your tank... dragonets stand the best chance with a 75g tank or larger, well-established without competition for the live foods it needs, with 100 lbs or more live rock. I've seen too many emaciated specimens to count -- too often people buy them someplace, then they learn that they are starving and many have brought them to me to "save"... sad
The canister is good for polishing the water - pack it with carbon and floss and run it for a few days after a water change to pick up particulate or run
phosphate sponge in it if you have phosphate issues, but don't put any biological media in it. If you take it off, empty and clean it (nothing stinks like stagnant canister water!!!).
You can do a HOB, or even just some more powerheads or something to improve the agitation at the surface. You ideally want to turn your water over 8-10 times per hour to get enough gas exchange - a canister doesn't allow any gas exchange within it as it's a closed loop.
Powerheads a good skimmer and occasional polishing with a canister should be just fine
Jenn
__________________
Member of the "J" Crowd & the BRW Crowd!
LFS Owner:
Imagine Ocean
Just keep skimming, just keep skimming, just keep skimming, skimming skimming! What do we do? We skim, skim, skim!
