Smaller substrates are much better for loaches. They like to pick through the substrate for food, and a finer substrate causes lees irritation and damage to their barbels. I just switched my main tank to Caribsea's Torpedo Beach sand.
Substrate that are rounded and smooth should be used for loaches and other bottom dwellers. It doesn't really have to be fine like sand unless you have loaches that like to bury themselves like kuhlis.
Substrate that are rounded and smooth should be used for loaches and other bottom dwellers. It doesn't really have to be fine like sand unless you have loaches that like to bury themselves like kuhlis.
That's true, a rounded substrate is better. I think sand is preferable, and the finer the better. I have to think in their native habitat they live in a combination of sand/mud.