Need advice on picking the right grass

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Verio

Aquarium Advice Newbie
Joined
Aug 3, 2020
Messages
3
..for my aquarium ofcourse ;)
Currently, I have sand in my aquarium, but I would like to have grass. What type of fast-growing grass can you guys recommend me? Im not gonna use CO2.
I let my LED lights on for about 9 hours a day.
Whats the cheapest and best substrate?

Also, Im kinda a lowtech user: i have never checked the water values or used any nutritions.
Do I have to use nutritions, or will the poop from my fishes be enough? If i start using nutritions, will i have to start checking the values?
I have 160Liters. 3 gouramis and 15 guppies
 
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