Stores
Here is some stores I have visited and my thoughts since you are new to the area.
1. Indoor Reef: Decent Saltwater selection, basic supplies, Nice Rocks and decent price too. They do 50% trade in credit value of your livestock. And they have clean up crews on hand and in a lot of them. (tacoma Local)
http://www.indooreef.com/ is there site.
(2. Barrier Reef: A bit far from Tacoma but worth the trip. They have a awsome frag tank. They carry some very nice variety of corals from soft to sps. They also carry some good food and nice quality plankton.(renton wa)
http://www.barrierreefaquariums.com is there website
3. Midway Pets: They are not very good on the frags or fish department. But they are pretty good on the hardware side of things. Tanks and equipment is cheap there (some not so cheap so do some homework first).
But I have found more tanks,filtration,food, all types of lights, sumps there at a low price..lower than most. They aslo have some nice rocks and a good price. Google Midway Tropical Fish and Pets.
(Des-Moines area)
4. Wild Side pets: East Tacomaish and have some salt stuff. I like the store cause they carry some supplies and foods that I cant find at indoor or petco. Live foods. Unique store with some very odd pets outside of salt spectrum to.
http://www.thewildsidepetswa.com/
5. Petco South Tacoma: Its in Lakewood Wa and has the only staff that knows and loves saltwater in the metro area. Avoid SouthHill Petco like the plague...poor care there and a manager that knows jack about the pets.
6. Tacoma Tropical Fish and Pet: Nice owner. Small store.. Small selection. But I get my Ro/DI water there for 1 buck a gallon. He is also offering a way to order stuff through his vendors at a low price through his site... #1 we can avoid shipping and get a better price through him.
http://www.tacomapet.com/
PS thats about it for now
Hopefully this gives you some "places of interest" to visit after you settle in.