Ahh, Myriophyllum ‘Guyana’ — great choice. It’s one of those plants that looks fancy and feathery but is actually pretty chill once you dial it in. Here’s a clean, practical care guide 👇

🌿 Myriophyllum ‘Guyana’ Care Guide

Overview

• Type: Stem plant

• Growth rate: Fast

• Difficulty: Easy → Medium

• Best for: Planted tanks, Dutch-style layouts, background accents

• Look: Bright green to slightly yellow-green, very fine feathery leaves

💡 Lighting

• Recommended: Medium to high light

• Under low light it’ll survive, but:

  • Stems stretch

  • Leaves get sparse

• Higher light = compact, bushy, showy growth

👉 If it starts looking leggy, lighting is usually the culprit.

🌊 Water Parameters

Very adaptable, which is part of its charm:

• Temperature: 20–28 °C (68–82 °F)

• pH: 5.5–7.5

• Hardness: Soft to moderately hard

Stable water matters more than “perfect” numbers.

🌱 Substrate

• Not picky.

• Grows fine in inert substrates (sand, gravel).

• Benefits from:

  • Nutrient-rich soil or

  • Root tabs if using inert substrate

🍃 Fertilization

This plant loves nutrients.

• Water column fertilizers: Highly recommended

• Needs:

  • Nitrates

  • Phosphates

  • Potassium

  • Iron & micros

Signs it’s hungry:

• Pale or yellowing leaves

• Slow growth

• Lower leaves melting