Vertex RX-U 1.5 reactor & ROX .8 carbon

[albert_dao]

It shouldn't float if it's properly waterlogged. You may lose a few grains here and there, but that's endemic to any reactor.

[syncro]

Stuffing the top with filter floss or the black foam cut to size helps.

[maron6977]

Thanks . I found by soaking for 24hrs , seems fine.

[Myka]

I don't like ROX carbon for that reason. I prefer pelleted carbon. I have a box of ROX I'm trying to use up, and I've been using it passively in a coarse media bag in the sump.