200 Micron Drawstring Filter Socks: These polyester filter socks are favored by both customers and aquarium service technicians. They prevent clogging while ensuring crystal-clear water. The durable construction allows for multiple cleanings and reuse. Custom Made: These filter socks are meticulously crafted based on exact specifications. Extensive testing has resulted in an optimal design. Water Quality Improvement: The interlocking micro-denier felt fibers efficiently trap uneaten food, livestock waste, decaying plants, detritus, and dust. Regularly changing these filter socks enhances water quality by removing solid organic compounds before they contribute to algae growth. Professional Cleaning Instructions: Included with the filter socks. Remember, maintaining clean filter socks is essential for a healthy aquarium! 🐠🌿🌊 Our 200 micron Drawstring filter sock with 4 inch opening is available in LONG (14 inches long). Our Filter Socks Help Keep Your Aquarium Clean and Healthier The interlocking micro-denier felt fibers are perfect for trapping uneaten food, waste excreted by livestock, decaying plants, detritus, dust, and other floating particulates. Changing filter socks regularly increases water quality by removing collected solid organic compounds before they continue to break down and add additional nutrients (which can increase algae growth) to your aquarium water. Directions Rinse new filter socks with clean fresh water and wring them out before using them in your filter. How to Clean Our Filter Socks You can find the exact steps we recommend to clean your filter sock by clicking our resource tab and find the article titled "How to Clean Filter Socks and Filter Bags" or you can click here. Our Experience I owned an aquarium store (and separate aquarium maintenance company) for over 25 years during which I spent a lot of time and resources searching out and testing countless filter socks to find the best for my clients. Fortunately, one stood above the rest giving consistent and repeatable filtration performance in all types of aquariums. These long-lasting heavy-duty filter socks are the best the industry has to offer!