Originally Posted by DRMALIKIA
Unless your bowl is super small, 2 should be decent. Just make sure you put them on the outer edges and rotate them so they do not burn the shisha. If it starts hitting hard move them and take one off. You may want to try 1 coal and a wind cover to get the same effect. All about heat management brother.
gotcha, i have been using one and moving it around the edge every say 15 mins? and it has gotten a fair amount of smoke. i'll def try 2 the next time i smoke. and hopefully it'll increase the thickness and flavor of the smoke without getting any harshness