Is African Onion Plant a Good Plant for Iridescent Shark?

African Onion Plant fits inside the water range normally used for Iridescent Shark. The shared window is about 22 to 28 °C, pH 6.5 to 7.5, and 4 to 18 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.

Iridescent Shark 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.

It gives Iridescent Shark useful visual shelter and line-of-sight breaks.

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.

Iridescent Shark is a catfish, 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 Iridescent Shark can actually use that structure instead of hiding the plant where it cannot do much.

This is a sensible planted-tank choice for Iridescent Shark, 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 Iridescent Shark actually swims, shelters, or uses cover.