.bf{font-size:0.98em;line-height:1.5;} .bf h3{margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;} .bf-cross{margin:0 0 14px;} .bf ul{margin:6px 0;padding-left:20px;} .bf li{margin:4px 0;} table.bf-spec{border-collapse:collapse;width:100%;margin:4px 0;font-size:0.95em;} table.bf-spec th,table.bf-spec td{border:1px solid #ddd;padding:6px 10px;text-align:left;} table.bf-spec th{background:#f6f6f6;font-weight:600;width:42%;} .bf-faq summary{cursor:pointer;font-weight:600;padding:8px 0;border-bottom:1px solid #eee;} .bf-faq p{margin:8px 0 12px;} The Fluval AquaClear AC110 BioFoam Insert is the mechanical filtration stage for the AquaClear 110 (AC110) hang-on-back power filter. Water entering the filter passes through this foam block first, where it traps debris, uneaten food, and floating particles for clean, clear water. The porous foam also becomes home to beneficial bacteria, adding biological support to your filter. Formerly sold as AquaClear Foam. Safe for freshwater and saltwater aquariums. This foam is the first stage in the Fluval AquaClear AC110 filter. Keep the full media stack fresh with Activated Carbon and BioMax inserts, or browse all filter media and cartridges at Squeaky's Aquatics. Why the BioFoam Mechanical filtration. Captures suspended debris and particles as the first stage in the media basket for visibly clearer water. Biological support. The open-cell foam hosts colonies of beneficial bacteria that help break down ammonia and nitrite. Perfect fit. Cut to size for the AquaClear 110 (AC110) so water is directed through the media, not around it. Reusable. Rinse in old tank water and reuse for months before it needs replacing, which keeps running costs low. Fresh or salt. Works in freshwater and saltwater aquariums. How the AquaClear System Works In an AquaClear filter, water flows up through three stages in order: BioFoam for mechanical filtration, Activated Carbon for chemical filtration, then BioMax ceramic rings for biological filtration. Keeping all three fresh gives you the cleanest, healthiest water. Specifications Type Replacement foam filter insert (BioFoam) Filtration stage Mechanical, with biological support Fits Fluval AquaClear 110 (AC110) power filter Water type Freshwater and saltwater Quantity 1 foam insert Care and Replacement Rinse the foam in a bucket of old tank water during water changes. Never rinse it under tap water, which kills beneficial bacteria. Replace the foam about every two months, or when it stays clogged or starts to break down. Stagger foam and other media changes so you never remove all your bacteria at once. Frequently Asked Questions Which filter does this fit?It is sized for the Fluval AquaClear 110, also labeled AC110. If you have a different AquaClear size, choose the matching BioFoam for the AC20, AC30, AC50, or AC70. How often should I replace it?Rinse it at each water change and plan to replace it roughly every two months, or sooner if it will not rinse clean or begins to fall apart. Can I use it in saltwater?Yes. The foam is inert and safe for both freshwater and saltwater aquariums. Do I still need carbon and BioMax?For best results, yes. The foam handles mechanical filtration, while the Activated Carbon and BioMax inserts add chemical and biological filtration to complete the AquaClear system.
