A clean, well-organised sump is a happy sump. Our Marine-Safe PETG Bio Block Holder is designed to fit Maxspect bio blocks perfectly, keeping two blocks securely in place and allowing maximum water flow through your filtration media. Printed in food-grade PETG — the only sensible choice for anything going near your livestock.
Why You'll Love It
Maxspect Compatible — Designed specifically to hold 2 Maxspect bio blocks securely with no rattling or shifting
Marine-Safe PETG — Printed in food-grade, reef-safe PETG plastic that won't leach chemicals or harm your livestock, corals, or water chemistry
Optimised for Flow — Open lattice design ensures water flows freely through and around your bio media for maximum biological filtration efficiency
Compact & Neat — Keeps your sump or filter chamber tidy and your bio blocks exactly where you want them
Made in the UK — 3D printed to order by S&K 3D Printing Ltd, built for reef keepers who take their water quality seriously
Perfect For
Whether you're running a nano reef, a mixed coral system, or a fish-only setup — if you're using Maxspect bio blocks, this holder is the finishing touch your sump deserves.
Browse our full range of Aquarium & Marine accessories for more reef-safe, 3D printed solutions for your tank.
Printed to order in the UK — because your reef deserves the best.
