Is African Onion Plant a Good Plant for Asian Arowana?

African Onion Plant fits inside the water range normally used for Asian Arowana. The shared window is about 26 to 28 °C, pH 6 to 7.5, and 4 to 12 dGH, which gives you enough room to aim for stable middle-ground conditions.

Both do best with moderate flow, so circulation does not need to be split into competing zones.

Both are suited to freshwater, so salinity does not add an extra planning problem.

Asian Arowana does not put unusual pressure on this plant compared with harder fish-plant combinations.

African Onion Plant has low cover density, high uproot resistance, and tough / leathery leaves. It can also help with breaking up sight lines and surface cover.

The plant helps break up sight lines, which can soften territorial behaviour.

There is no special plant-pressure warning here, so solid anchoring and stable husbandry matter more than unusual protection.

African Onion Plant is a bulb / tuber plant usually used midground and background.

Asian Arowana is an oddball fish, so the pairing works best when the planting style supports how that fish uses space and cover.

African Onion Plant reaches about 100 cm tall by 30 cm wide and is usually bulb / tuber on or partly in substrate with nutrient-rich substrate preferred. That makes placement and anchoring more important than simply adding a larger bunch of stems or leaves.

In this pairing, the useful plant values are line-of-sight breaks and surface cover. Place it where Asian Arowana can actually use that structure instead of hiding the plant where it cannot do much.

This is a sensible planted-tank choice for Asian Arowana, especially when you want the plant to do real work as cover, sight-line structure, or habitat detail.

The decision should center on layout quality: keep the plant in the zone where Asian Arowana actually swims, shelters, or uses cover.