Features MAKES WATER CLEAN AND CLEAR Uses BIO-CHEM ZORB® an exclusive research grade resin-carbon blend. BIO-CHEM ZORB® removes compounds that carbon alone cannot remove. SELF PRIMING - EASY START-UP Primes in seconds with only a cupful of water. Does not require hand-pumping or manual siphoning to start. Patented anti-airlock system eliminates the need to re-prime. QUICK DISCONNECT - EASY MAINTENANCE Centralized control of all functions to remove canister without losing prime. Self-locking water shutoff system prevents accidental flow during maintenance. VERY QUIET & POWERFUL 3-STAGE FILTRATION Holds any combination of filtration media: mechanical, chemical and biological. Maximum capacity baskets. Each basket holds up to 4 different media pouches. Inner dividers allow maximum flexibility. Benefits The superior design of the API FILSTAR XP makes it one of the most reliable canister filters. Its solid construction ensures a trouble free and quiet operation. Strong flow rates and superior filtration media provide optimal filtration results with very easy maintenance. Filtration Media API FILSTAR XP comes with efficient media* for powerful 3-stage filtration: Step 1: Filtration pads of 20 ppi and 30 ppi remove debris (mechanical filtration) Step 2: API BIO-CHEM STARS quickly establish the biological filter. They provide 4 times more surface area than ceramic rings for massive bacterial colonization (biological filtration) Step 3: API BIO-CHEM ZORB makes water clean and clear. It removes colors and odors as well as compounds that carbon alone cannot remove * The exact contents of the box can vary depending on the filter model