Pool filter sand or special Black 1-2 mm sand ?
I am in the process of changing from dirt+gravel to just sand substrate and water dosing since i've researched and asked and it's the best way to maintain a planted tank at least for me.
But , I want to first try the sand way in my 5 gallon betta tank first.
What i want to know , from other hobbyists experience, what is the ideal grain size for a freshwater tank in order to both be good for plant growing and also coarse enough as to not stir up and float into the filter to burn the motor.
I see most people recommend Pool filter sand as the best all rounder , easy to maintain, coarse enough to allow water circulation and also plant friendly.
But i've searched to buy some and the grain size is between 0.4 up to 0.8 or 1 mm . Isn't that too fine and not heavy enough to stay on the bottom when diggers stir it? I am worried that it will get into the filter and burn it.
Also i have the option to buy special sand from an online aquarium store , black 1-2 mm sand...I would love that but isn't 2 mm too coarse(not compact enough to hold small plants like carpets or other small plants) for planting ?
Please share your experiences and knowledge. Thank you in advance