A reusable, media-flexible alternative to disposable filter socks — designed specifically for Innovative Marine NUVO aquariums that use the midsize 4" filter sock and holder. If you own an Innovative Marine NUVO SR60, SR80, or SR120 (or any IM tank that uses their Midsize 200-Micron Filter Sock and the 4" Sock Holder), this basket drops directly into the same slot — no modifications, no adapters, no guesswork. Stop replacing socks every two weeks. Instead of constantly buying and tossing felt socks, fill this basket with the media that actually fits your reef: phosphate remover, bio balls, filter floss, GFO, carbon bags, Purigen, or anything else. ✓ Compatible With Innovative Marine NUVO SR60 Innovative Marine NUVO SR80 Innovative Marine NUVO SR120 Any IM tank using the Midsize 4" filter sock with the standard 4" sock holder Not sure if your tank fits? Measure the slot where your current sock sits — if the opening is approximately 5 7/16" wide × 4" deep, this basket is a direct replacement. Have a different IM model? Message us and we'll print one to your exact dimensions at no extra charge. Why Choose the Printed Reef Filter Basket? Drop-in replacement — designed to the exact 5 7/16" × 4" footprint of the IM 4" sock holder. Slides into the same slot your current sock sits in. Run any media you want — phosphate remover, bio balls, filter floss, active carbon, GFO, Purigen. No more being locked into felt socks. Built to last — printed from 100% reef-safe PETG, durable and safe for marine life. Pays for itself within a few months of skipped sock purchases. Custom sizing available — standard size fits SR60/80/120, but we can print to your exact dimensions if you have a different IM tank or a non-standard sump. Looks good in your sump — available in Black, White, Blue, Red, and Orange to match your build. How It Works Remove your existing 4" Innovative Marine filter sock and holder from the sump Drop this Filter Basket into the same slot Fill with whatever media your tank needs Rinse the basket monthly — no more disposable socks FAQ Will this fit my Innovative Marine tank? If your tank uses the standard Innovative Marine Midsize 4" filter sock (SR60, SR80, SR120, and others), yes — this is a direct drop-in replacement. If you're not sure, measure your existing sock holder. The basket fits a slot of approximately 5 7/16" wide × 4" deep. Will this fit other brands of aquariums? This product is sized specifically for the Innovative Marine 4" sock format. It will not fit Red Sea, Waterbox, Reef Octopus, or other brands' sock holders. However, we offer custom sizing on request — if you have a different sump and know the dimensions, message us and we'll print one to fit. Why use a filter basket instead of a sock? Filter socks need to be replaced or washed every 1–2 weeks. A reusable basket lets you run any media you want (carbon, GFO, phosphate remover, bio balls, floss) and just rinse it monthly. Most reefers find it both more flexible and cheaper over time. Is PETG safe for reef tanks? Yes. PETG is chemically inert, FDA food-contact-safe, and used widely in the reef hobby for sumps, skimmer parts, and accessories. It will not leach chemicals into your water. Does it come with media? No — the basket is sold empty so you can fill it with whichever filtration media works best for your system.
