Can Whiptail catfish Live With Royal panaque?

The whiptail is the fish at risk. Its own profile calls it unsuitable for the general community because it is retiring, needs pristine water, and is easily outcompeted for food by larger or more vigorous species. A 43 cm royal pleco is the larger, more vigorous species in any tank they share, and the pleco's own profile adds that it is territorial toward catfish of a similar size, which a 15 cm loricariid begins to approach.

Water is tight on both axes: 24 to 27 °C and pH 6.5 to 7, the meeting point of a fish that wants slightly acidic water and one that does not go below 6.5.

If you try it, the tank has to be big enough that the whiptail gets its own vertical driftwood and its own grazing well away from where the pleco settles. That is harder than it sounds, because bogwood is exactly what the pleco wants too: it appears to eat the wood and treats it as its hiding place. Both live on aufwuchs and algae, so the tank must be mature, with real biofilm, backed up by algae wafers, spirulina and blanched courgette offered after dark. Watch the whiptail's condition rather than its behaviour, since a fish that is quietly losing out keeps sitting where it always sits while it thins.