Yes, the Marimo moss balls help keep the water clean.
From the quick reading I've done this is an excellent forum. Haven't had a fish tank in over 10 years. Use to have Cichlids and they did well, but decided to start with a small tank and try a Betta. Got a 5.5 gal set from Petsmart, but I still need to get a heater, gravel, decorations and of course get it cycled. Then off to find a male Betta.
1 questions - has any used Marimo Moss Balls in a Betta tank? Are they OK ?
I live in Southern Florida and my other hobby is 3D digital art - mostly dragons