perlite vs coarse sand

Coarse sand is OK but pearlite is better.

eu usei 5L perlite em 20 L de terra está bom? ou mau? Canna Terra Profissional Plus+

Yes you can use it. Premix it with the soil. You will need 30% sand for it to work well. Gl

Coarse sand definitely helps but it hold quite a bit of water as well. It is good to add to topsoil on in-ground outdoor grows. If no perlite, then vermiculite or a hydroton type inert media. Hope that helps and happy growing!!!

Hi mate, the purpose of adding perlite or vermiculite is to air-ate the soil. Allowing water to drain quickly and sustain moisture and oxygen in the substrate. Adding sand may make the soil less able to drain and maintain field capacity. More likely to keep water where you don't want it. I hope this helps, good luck and happy growing