What is Guppy Grass?

Guppy grass is widely known as najas grass, and it is also scientifically called Najas guadalupensis. This grass as guppy attached to its name because it gives a lot of hiding spaces for baby guppies  and adult fish.

What is Guppy Grass?

Guppy grass is widely known as najas grass and grows quickly and will help to remove substrates, toxins, nitrite, heavy metals in your aquariums water.

One of the disadvantages of growing this grass in the aquarium is the rate at which it consumes the available nutrients in the aquarium, and guppy grass inhibits algae growth.

Guppy grass is everywhere and not hard to find; it can be found naturally in freshwater, lakes, brackish ponds, and streams. Examples of other fish that thrive in the presence of Guppy grass are rainbow fish, ember tetras, pearl danios, infusoria, etc.

What is Guppy Grass

Are You Looking To Keep Guppies? If yes check out our care guide here

Guppy Grass Care

Guppy grass grows well within the 6.0 to 7.0; there are diverse ways of placing it in your aquarium. You can choose to leave it to float in the aquarium or plant it somewhere in the tank/aquarium though most aquaculturists prefer to leave the guppy grass floating.

It is an unfussy plant which requires no fertilizer, soils, co2 before they sprout, they grow optimally so far there is a nutrient in the aquarium. However, few people add liquid fertilizers to the tank intending to grow guppy grass fast, but they still grow with/without fertilizer.

It is advisable to trim guppy grass at least once every 14 days because of their growth rate. You will probably experience a reduction in light penetration to the bottom of the aquarium if guppy grass is not trimmed occasionally.

Besides, other aquarium plants will find it challenging to grow around thick guppy grass, especially if they can’t sprout without high light penetration.


We know guppy grass will grow in almost any condition; its propagation is a big issue because they are fast-growing, and you should pay close attention to the growth of the grass, so that they don’t be a cluster to the wheel of your guppies growth. You should only leave guppy grass to propagate if you sell the grass or have enough tanks to contain them.


Though guppy grass does not overwinter just as hornwort, it has plans in breeding any livebearing fish, baby egg scatterers, guppies, or shrimps. One of the significant benefits of guppy grass is its high rate of water absorption in case you open the tap and forget to close it, and it provides a lot of hiding space for fries.


Proper dumping is key to preventing the proliferation of guppy grass in your environment. They grow like wide fire, and there are people that bury while some burn them after packing out of the aquarium, if you can’t do any of these, you can wrap the unwanted guppy grass into a plastic waste bin or soak them in a beach.

Ensure you dispose them properly because they can block local waterways, among many other havoc they can cause. Close examination is needed from you whenever they are in your aquarium, but they provide one of the best hiding spaces for aquarium fish.


Hello, I'm Jason. I'm the guy behind HelpUsFish.com. I volunteer at my local fish shop and I created this site to offer tips and advice on the fish I care for.

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