Is African Onion Plant a Good Plant for Figure 8 Puffer (Brackish)?

African Onion Plant and Figure 8 Puffer (Brackish) do not share a clean environmental window, so the pairing is already under pressure before behaviour is even considered.

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

Water type is a serious mismatch: African Onion Plant is listed for freshwater, while Figure 8 Puffer (Brackish) is listed for brackish water.

Figure 8 Puffer (Brackish) 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.

The limiting issue is they are adapted to different water types.

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

Figure 8 Puffer (Brackish) is a puffer, 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 Figure 8 Puffer (Brackish) can actually use that structure instead of hiding the plant where it cannot do much.

For most keepers, a tougher or better-matched plant is the smarter choice. If you still try it, test with a small amount first and be ready to move the plant before it is badly damaged.

The decision should center on this signal: They are adapted to different water types.

African Onion Plant is usually the wrong plant for Figure 8 Puffer (Brackish) if your goal is a stable display tank. The issue is rarely one dramatic failure on day one; it is the steady mismatch between what the fish does in the scape and what the plant needs to stay attractive long term.