They work pretty good with the "sock" on there. I did caution him to keep it out of the gravel.
The problem this customer has is he bought a 90 gallon and is too short to reach the bottom of the inside glass on the front or sides, or the back glass at all.
I swear sometimes I think he keeps me around just because he can have me rearrange the tank for him instead of having to get out and get onto a step stool.
Karen, did you try the fire ant recipe yet?