Troubleshooting
New Zealand Micro Sword problems — and how to fix them
New Zealand Micro Sword (Lilaeopsis novae-zelandiae) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Overheating in tropical tanks
Performs poorly above 24°C. Best suited to cool-water or temperate aquariums; consider unheated or lightly heated setups.
Slow carpeting without CO2
Runner production is slow, especially in cool tanks. CO2 injection at even 10–15 ppm meaningfully accelerates spread.
Algae on blades
Green spot algae colonises the smooth cylindrical blades. Nerite snails are effective grazers; maintain stable lighting duration.
Root rot in warm, anaerobic substrate
Warm temperatures accelerate anaerobic conditions. Maintain cooler temperatures and ensure adequate substrate aeration.
Competition from faster tropical plants
In mixed setups, tropical plants may shade this cooler-adapted species. Pair with similarly slow-growing, cool-tolerant species.
Prevent new zealand micro sword problems before they start
Most new zealand micro sword issues are care-mismatch, not bad luck. Dial in the basics:
New Zealand Micro Sword problems — FAQ
Why is my new zealand micro sword overheating in tropical tanks?
Performs poorly above 24°C. Best suited to cool-water or temperate aquariums; consider unheated or lightly heated setups.
Why is my new zealand micro sword slow carpeting without co2?
Runner production is slow, especially in cool tanks. CO2 injection at even 10–15 ppm meaningfully accelerates spread.
Why is my new zealand micro sword algae on blades?
Green spot algae colonises the smooth cylindrical blades. Nerite snails are effective grazers; maintain stable lighting duration.
Why is my new zealand micro sword root rot in warm, anaerobic substrate?
Warm temperatures accelerate anaerobic conditions. Maintain cooler temperatures and ensure adequate substrate aeration.
Why is my new zealand micro sword competition from faster tropical plants?
In mixed setups, tropical plants may shade this cooler-adapted species. Pair with similarly slow-growing, cool-tolerant species.