Growing cryptocoryne parva: the ultra small species.

[starlord]

I periodically experiment with plants that supposedly require Co2. This one might just fit the bill. Do they come in a compact or dwarf variety? My specimen is extremely small with very deep, glossy green leaves - almost like a miniature version. Unlike the C. parva I grew years ago, this one has a much darker green hue and seems to be naturally smaller. I mean, small is relative, but you get the idea. It's possible the leaves are being nibbled, which could be stunting its growth. Your thoughts?

[Giggletons]

I think the issue is that these plants just grow really slow, and their size or color can be misleading. They might not necessarily need CO2, but it definitely gives them a boost. I've seen some photos that look like they're grown emersed, maybe it's still adapting and needs time to develop proper water leaves.

[coltin]

No dwarf form for this one.

As for CO2, it's not a requirement.

Small size likely just means it's still young and needs time to mature.

[whetu]

I'm running just basic stuff - fish poo for ferts and a natuflake light.

[willie32]

I've had decent success with Crypts in low-tech setups, they seem to thrive in those conditions. I think they can get by just fine without supplemental CO2. Growth might be slow either way, but I've found they tend to grow bigger and bushier in low-tech environments.

Different nurseries can produce different strains of the same plant, so it's possible that the Crypts you're remembering from years ago were from a different source, like Tropica or Denerle.