Filter Sock: 7" x 16" FELT w/ Draw String Glass Cleaners Based on the default testing

Based on the default testing schedule of 4x alkalinity

Tropic Marin Pro Reef Salt mix contains optimized levels of calcium and magnesium while keeping the correct pH value and a balance of all 70 trace elements required by corals to grow and thrive

Three-dimensional flow - A unique patented design is unrivaled in creating three-dimensional flow conditions and gyres

Compatible with all Apex models

Filter Sock: 7" x 16" FELT w/ Draw String Glass Cleaners Based on the default testingThese 200 Micron filter socks are used to remove small floating particles from aquarium water. This can dramatically improve water quality and reduce maintenance on filters that would otherwise become clogged. The draw string attaches directly to plumbing for almost any sump configuration.