I use sponge filters in all of my shrimp tanks. The work great and shrimp LOVE to sit on them picking food off of them.
For a HOF, I have taken the sponge materal from an Aquaclear HOF and put it over the intake. This works great also.
Steve
For a HOF, I have taken the sponge materal from an Aquaclear HOF and put it over the intake. This works great also.
Steve