Otocinclus (Otocinclus sp.) is a intermediate-level freshwater fish that needs at least 15 gallons and 72-79°F. A tiny algae-grazing catfish that does best in a mature, planted tank with a steady supply of biofilm. Often fragile when newly imported.
Care facts at a glance
| Scientific name | Otocinclus sp. |
|---|---|
| Family | Loricariidae |
| Origin | South America |
| Adult size | 1.5-2 in |
| Minimum tank | 15 gallons |
| Temperature | 72-79°F |
| pH | 6.5-7.5 |
| Temperament | Peaceful |
| Social behavior | Groups, keep 4+ |
| Swim level | Mid to bottom (on plants and glass) |
| Difficulty | Intermediate |
| Diet | Algae and biofilm; supplement with veggie wafers |
| Typical lifespan | 3-5 years |
Quick tips
- Add only to a tank with visible algae or biofilm.
- Supplement with veggie foods.
- Keep a group of 4 or more.
San Diego water
Captive-bred stock usually adapts to San Diego tap water with slow acclimation. For best color and health, many keepers blend tap with RO/DI water. Learn the numbers in our San Diego tap water guide.
Before you buy
Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.
Find it at Pet Zone
Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.
4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm
Aquascaping, planted tanks
4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm
Monster fish, koi