which grain of black blasting sand should be used?

[bobc4d]

I went by Tractor Supply and they have two levels of grain of the blasting sand, fine and course. A bag of the fine grain had a slight tear in it, I felt the sand and it is very fine, I would think it could be sucked up in the intake of my Fluval 206. Would the course be to rough for cory cats?

 

[armymp327]

if you are worried about sand being sucked into the filter then a pair of clean never washed panty hose and a zip tie will fix that.

for the corys id go with the fine though, will be easier for them to sift through

 

[blert]

It won't get sucked up into your filter unless you toss a handful at the intake. The stuff is deceptively heavy.

 

[NYgiantsRP]

Yup, the sand is heavy, it won't get sucked up up unless you are moving it around a lot. I would get the fine, the more fine the better for cories.