Egg Crate Refugium in Sump

[Diesel48]

I built a 8"x15" egg crate rectangle to hold some cheato in my sump. The problem I have is that it floats. How do you weigh these down?

 

[t5Nitro]

If you've got some rock rubble to throw on the bottom, that'll work--or a cup of sand.

 

[landlubber]

If you've got some rock rubble to throw on the bottom, that'll work--or a cup of sand.

my thoughts as well. spare frag plugs or rubble, both would suit the job fine.