Seachem Phosguard substrate and rocks when doing so

when doing so

but it is not recommended for phosphate-buffered freshwater

check valve and diffuser

Which Juwel Carbax variant should I choose

Seachem Phosguard substrate and rocks when doing soSeachem Phosguard Seachem Phosguard is a spherical phosphate and silicate filter media for marine and freshwater aquaria. It is designed for aquarium keepers who need to reduce phosphate or silicate levels with a highly porous media that supports strong water flow through the filter. Key Benefits Rapidly removes phosphate and silicate from aquarium water. Highly porous media provides high capacity. Spherical bead shape supports water flow and helps