| Business | Phone |
| Chem-Pro Laboratory Inc 941 W 190th St, Gardena 90248 | (323) 770-8515 |
| Offshore Marine Lab Inc 2010 W 135th St, Gardena 90249 | (310) 352-3100 |
| Ultra-Flo Systems Inc 261 E 157th St, Gardena 90248 | (310) 323-8875 |
| Unitech Aqua Corp 555 W Redondo Beach Blvd # 265, Gardena 90248 | (310) 515-8700 |
| Aqua Crystal 1024 W Gardena Blvd, Gardena 90247 | (310) 515-5775 |
| Atlantic Water Systems 14613 Purche Ave, Gardena 90249 | (310) 263-2434 |
| Village Marine Tec 2000 W 135th St, Gardena 90249 | (310) 516-9911 |