How Many Royal Pleco (L190) in a 125-Gallon Tank?
In a 125-gallon tank, plan on about 1–2 Royal Pleco (L190), leaving room for tankmates and filtration headroom.
Why
Stocking is driven by adult size and waste output, not just fish count. Royal Pleco (L190) reaches about 16" with a heavy bioload, and needs 73–82°F water at pH 6.5–7.5. Always cycle the tank and test water before adding livestock.
| Adult size | 16" |
|---|---|
| Minimum tank | 125 gallons |
| Temperature | 73–82°F |
| pH | 6.5–7.5 |
| Temperament | Semi-aggressive |
| Schooling | No |
| Diet | Herbivore |
| Care level | Moderate |
| Origin | Colombia and Venezuela |
More fish for a 125-gallon tank → Royal Pleco (L190) tankmates →