You have so many LFS out there. I don't think it'll be a problem for you to just google local fish stores near you. You're lucky I saved this list I made in my notes.
Monrovia Tropical Fish & Pet Supply
4/5 stars
603 W. Huntington Dr.
Monrovia, CA 91016
626-357-7926
1. Pasadena Tropical Fish (Near 210 Fwy)
4 out of 5
2982 E. Colorado Blvd.
Pasadena, CA 91107
626-449-4987
2. Super Pets (Check out in the future) Datnoids and cool looking crabs too.
4.5 out of 5
9403 Las Tunas Dr.
Temple City, CA 91780
626-237-0715
3. CK Aquarium
3 out of 5
431 S. San Gabriel Blvd
San Gabriel, CA 91776
626-237-0889
4. Rosemead Aquarium
5 out of 5 Stars
9123 Valley Blvd.
Rosemead, CA 91770
626-287-5083
5. D & L Aquarium N Pet
No rating
1512 S. San Gabriel Blvd
San Gabriel, CA 91776
6262-573-0798
6. Total Fish & Pets (Left debit card here) Good fishes here
3.5 stars out of 5
137 E. Valley Blvd
Alhambra, CA 91810
626-571-9840
626-282-2021
5. Fish & Pets Utopia
4 out of 5
711 E. Garvey Ave
Monterey Park, CA 91754
323-240-9298
Open: 10:30 am
Closed: 8:00 pm
Mon-Sun
6. Lee's Aquarium
319 E. Garvey Ave
Monterey Park, CA 91755
626-571-4982
Mon-Fri: 8:00am to 5:00pm
Sat: 9:00am to 1:00pm
Sun: Closed
7. Pet Center
1950 S. Atlantic Blvd
Monterey Park, CA 91754
323-726-6708
Open: 10:00 am
Close: 8:00 pm
8. Atlantic Aquarium (SUCKS!! Expensive ass Datnoids!)
1419 S 9th St, Alhambra, CA 91803, United States
The Aquarium (Too far. Near Santa Monica)
4 out of 5
5403 Sepulveda Blvd
Culver City, CA 90230
310-390-1240