Common Pleco tank mates
Sold at 8 cm, grows to 45 cm or more in three to five years, and produces the waste output of a small dog. Get a bristlenose pleco instead.
Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.
Best tank mates (on file)
Merged from conservative safest and best with fields — de-duplicated by species.
The Common Pleco profile lists Green Terror as both safe and a recommended pairing. Green Terror is a aggressive intermediate-care species with a 300L minimum. Run the pair checker for your specific tank before stocking.
The Common Pleco profile lists Jack Dempsey as both safe and a recommended pairing. Jack Dempsey is a aggressive intermediate-care species with a 200L minimum. Run the pair checker for your specific tank before stocking.
The Common Pleco profile lists Oscar as both safe and a recommended pairing. Oscar is a aggressive intermediate-care species with a 300L minimum. Run the pair checker for your specific tank before stocking.
Risky or situational
From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.
None on file beyond the safe list.
Fish to avoid with Common Pleco
From the unsafe list — predation, aggression, or space rules on this profile.
Bristlenose Pleco conflicts with Common Pleco on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.
Tank size and groups
- Published minimum for Common Pleco: 600L — group minimum 1 .
- Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
- Nearest litre hub to this minimum: 300L hub.
Easier alternatives to consider
Conservative beginner-peaceful picks from the library — not replacements for reading, but a shorter on-ramp than this species for a first tank.
Plan before you buy
Pair checks for every mix, then multi-species stocking in the builder.
Filtration & heating
A 600L minimum tank for Common Pleco needs a filter rated for at least 2400L/hr turnover and a heater maintaining 22–30°C.
Similar fish (same category)
- Royal pleco — min 500L
- Clown Pleco — min 110L
- Siamese Algae Eater — min 100L
- Bristlenose Pleco — min 80L
- Otocinclus — min 60L
Related (care + temperament)
Other species that list Common Pleco
Reverse lookup: these profiles reference Common Pleco under safe or “best with” lists.