Can Boivin's Aponogeton and Micro Sword Grow Together?

Boivin's Aponogeton and Micro Sword share a workable water window around 18 to 26 °C, pH 6 to 7.5, and 2 to 15 dGH.

Boivin's Aponogeton is listed for freshwater, while Micro Sword is listed for freshwater to lightly brackish water. Keep the tank in the shared part of those tolerances rather than pushing either plant to an edge.

Flow is workable if the layout gives Boivin's Aponogeton strong, stream-style flow and Micro Sword moderate flow.

Their light and CO2 needs are close enough for one routine: Boivin's Aponogeton does best with moderate light and optional added CO2, while Micro Sword does best with moderate light and recommended added CO2.

They naturally settle into different parts of the scape, which gives you more room to use each species for what it does best instead of forcing direct competition.

Boivin's Aponogeton reaches about 80 cm tall by 30 cm wide, while Micro Sword reaches about 7 cm tall by 15 cm wide. Use those mature sizes for the layout, not the small nursery portions you bring home.

Shade is worth watching, but it is usually manageable through trimming and a little spatial separation.

Boivin's Aponogeton is typically bulb / tuber on or partly in substrate with nutrient-rich substrate preferred and feeds mainly as a root feeder. Micro Sword is typically rooted in substrate with nutrient-rich substrate preferred and feeds mainly as a root feeder. That difference can make the pairing easier to arrange than two plants fighting for the exact same root or attachment zone.

Mature size is not the main thing working against this pairing, so normal maintenance is usually enough to keep the scape readable.

Boivin's Aponogeton brings fast growth, moderate maintenance, and intermediate difficulty. Micro Sword brings slow growth, moderate maintenance, and intermediate difficulty. If one grows much faster, trim that plant before it starts making the other look like the problem.

The practical watch-outs are that the layout needs a little thought so one plant does not slowly dim the other; and that growth pace and maintenance rhythm are uneven, so the stronger grower can dominate if pruning slips.

The strongest reasons to try the mix are that they share a workable temperature window around 18 to 26 °C; and that their flow preferences sit close enough to tune one layout around both plants.

Use this pairing when you are willing to manage the scape, not when you want a plant-and-forget combination. Start with more spacing than you think you need, then adjust once both plants show their real growth pace.

The simple success test is whether both plants still look healthy after the faster grower has been trimmed several times. If one keeps declining after routine care, the layout is probably asking too much of it.