Red Myriophyllum
Myriophyllum tuberculatum
Red Myriophyllum (Myriophyllum tuberculatum) is a stem plant for the background, growing to about 40 cm (15.7 in) at a fast pace. It wants 68–82°F (20–28°C), high light and pressurised CO₂, and counts as an advanced plant to keep alive.
At a glance
| Type | Stem plant |
|---|---|
| Light | HighThe least light it survives in, not the light it looks best in. |
| CO₂ | RequiredWhether it survives without added CO₂ — not whether CO₂ would help it grow faster. |
| Difficulty | Advanced |
| Temperature | 68–82°F (20–28°C) |
| Max height | 40 cm (15.7 in)Grown submersed, left to mature, never trimmed. |
| Growth rate | Fast |
| Placement | planted in the background |
| pH | 6–7.5 |
Before it goes in
- Red Myriophyllum needs high light. A low- or medium-light LED is not enough for it to last.
- Pressurised CO₂ is required — without injection it melts away rather than settling in.
- It only colours up under strong light with CO₂; in a low-tech tank it stays green.
- At about 40 cm (15.7 in) it belongs behind everything shorter — planted at the front it hides the rest of the scape and shades it.
- Its leaves are soft: Goldfish, Common Pleco and Molly will eat it.
- It counts as an advanced plant: it is not a first-tank pick.
Can it grow without CO₂?
No. Red Myriophyllum needs pressurised CO₂; without it, it melts back rather than settling in.
How much light does it need?
High light — and that is the survival line, not the “it looks better” line. Colour is a separate question: it only turns red under strong light with CO₂.
How big does it get?
About 40 cm (15.7 in) tall when it is mature and untrimmed, growing fast, after roughly 2 weeks to root in.
Will my fish eat it?
Its leaves are soft, so some will: Goldfish, Common Pleco and Molly.
What it goes with
- Plants that run on the same light and CO₂, so they can share a tank without one of them being the odd one out: Water Sprite, Anubias nana 'Petite', Cryptocoryne wendtii and Dwarf Hairgrass Mini.
- Animals that share its temperature range and will not eat or uproot it: Betta, Cherry Shrimp, Angelfish and Bristlenose Pleco.
Often compared with
| Red Myriophyllum | Myriophyllum 'Guyana' | Myriophyllum mattogrossense | |
|---|---|---|---|
| Light | High | Medium | Medium |
| CO₂ | Required | Recommended | Recommended |
| Max height | 40 cm | 30 cm | 30 cm |
| Difficulty | Advanced | Medium | Easy |
More plants
Sources (2) · checked Sep 2026
- Namesbuceplant.com
- Growth in low lightflowgrow.de