Aqua One Sponge 35S 1 Pack
Keep your aquarium water clean and healthy with the Aqua One Sponge 35S 1 Pack, the genuine replacement biological sponge for the Aqua One Mini 301F Internal Filter. Designed to trap debris, waste and excess food, this high-quality sponge also provides essential surface area for beneficial bacteria to grow, helping break down harmful toxins and support stable water conditions.
Easy to install and recommended for replacement every 8 weeks, the 35S sponge ensures your filter continues to operate efficiently, delivering crystal-clear water and a healthier environment for your fish.
Key Features & Benefits
- Genuine Aqua One replacement sponge for Mini 301F Internal Filters
- Biological filtration surface for beneficial bacteria growth
- Traps debris, waste, and excess food
- Designed for efficient internal filter performance
| Specification | Detail |
|---|---|
| Model | 35S |
| Compatibility | Aqua One Mini 301F Internal Filter |
| Quantity | 1 Pack |
| Replacement Interval | Every 8 weeks |
FAQ
Is the Aqua One Sponge 35S compatible with the Mini 301F filter?
Yes, the Aqua One Sponge 35S is specifically designed as a genuine replacement for the Aqua One Mini 301F Internal Filter.
How often should I replace the sponge?
It is recommended to replace the sponge every 8 weeks to maintain optimal filter performance.
Does the sponge support biological filtration?
Yes, the sponge provides a large surface area for beneficial bacteria to grow, supporting biological filtration and toxin breakdown.

Edward Greene –
I replaced my old sponge with the 35S model and noticed a clear improvement in water clarity within a week. The filter works smoothly and the fish seem more active. Easy to install and fits perfectly in the Mini 301F filter.
Jacob Avery –
The sponge holds up well after 6 weeks of use. It traps food waste effectively and keeps the water clean. I haven’t had any filter clogging issues since switching to this sponge.
Anthony Wilkins –
Great product for maintaining a healthy tank environment. The bacteria growth is visible and the water stays stable. I follow the 8-week replacement schedule and it’s been reliable so far.