Can Micro Sword and Red Ammannia Grow Together?

Micro Sword and Red Ammannia share a workable water window around 22 to 28 °C, pH 6 to 7.5, and 2 to 12 dGH.

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

Both prefer moderate flow, so circulation can be planned as one steady pattern.

Their light and CO2 needs are close enough for one routine: Micro Sword does best with moderate light and recommended added CO2, while Red Ammannia does best with high 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.

Micro Sword reaches about 7 cm tall by 15 cm wide, while Red Ammannia reaches about 45 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.

Micro Sword is typically rooted in substrate with nutrient-rich substrate preferred and feeds mainly as a root feeder. Red Ammannia is typically rooted in substrate with nutrient-rich substrate preferred and feeds mainly as a mixed 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.

Micro Sword brings slow growth, moderate maintenance, and intermediate difficulty. Red Ammannia brings moderate 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 main watch-out is that the layout needs a little thought so one plant does not slowly dim the other.

The strongest reasons to try the mix are that they share a workable temperature window around 22 to 28 °C; and that their flow preferences sit close enough to tune one layout around both plants.

Use this pairing when you want two plants that can share one routine without forcing a compromise at every step. It is strongest in tanks where mature spacing is planned before the plants fill in.

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.

Micro Sword and Red Ammannia make the most sense when you want contrast in shape or placement without forcing one plant to live under the other's care regime. The pairing usually works best in scapes where both plants have a defined job rather than competing for the exact same space.