Guppy Grass (Najas guadalupensis) is a beginner-level aquarium plant. A delicate, fast-growing plant that hides fry and absorbs nutrients.

Care facts at a glance

Scientific nameNajas guadalupensis
FamilyHydrocharitaceae
OriginAmericas
Height12-24 in
LightLow to medium
CO2Not needed
PlacementFloating or anchored, stem
Growth rateFast
Temperature65-86°F
pH6.0-8.0
DifficultyBeginner
PropagationCuttings

Quick tips

  • Trim often.
  • Great for fry cover.

San Diego water

Tolerates San Diego's hard, alkaline tap water (pH roughly 7.6-8.6) with slow acclimation and a conditioner that handles chloramine. Learn the numbers in our San Diego tap water guide.

New to planted tanks? Start with our beginner planted tank guide and the plant fertilizer guide.

Find it at Pet Zone

Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.

Pet Zone Convoy

4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm

Aquascaping, planted tanks

Pet Zone Mid-City

4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm

Monster fish, koi