I'm researching online:
- Steve Weast has a wonderful website at OregonReef
- There is a temperate forum at Temperate Reef
- MSAP has great info on critters
Basically I've been looking at what Coldwater Marine Aquatics has available (they also do a good job of describing the critters), then researching to see how they'll do in my small tank. (No use getting a fish that'll grow to be 8 inches, or a starfish that will eat everything else.) As I better understand what works and what doesn't I may try requesting livestock not currently on the stocklist, but with only 5.5 gallons to play with I need to be thoughtful about what I add.
As an update, I'm doing frequent water changes (2 or so a week) and the skimmer is working great (I'll probably get some more to try on the other small tanks), but I'm still registering low nitrites and have lost the larger barnacles. The smaller ones are doing well, though, and the little mussels that came with them are also doing okay. I suspect that I just couldn't feed enough to keep the big ones going without killing such a small tank. I also haven't seen the sculpin in the last week. Everything else seems to be doing well, though, and the gobies are loving their new tankmates.