# Filter sponge HAPPET fine-pored 25 x 25 x 5 cm for aquarium filtration and biological media

**URL:** https://aio.lv/en/product--happet-vat016296--12074255
**Data updated:** 2026-03-12 21:53 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** HAPPET
**Manufacturer code:** VAT016296
**EAN:** 5907708639721
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

HAPPET fine-pored filter sponge sized 25 x 25 x 5 cm designed for aquarium filtration. Serves as a mechanical and biological filter media, trapping debris and providing surface area for beneficial bacteria colonisation. Compatible with internal and external filter housings or DIY filter boxes; suitable for freshwater and marine setups where a fine foam pad is required.

## Long description

HAPPET fine-pored filter sponge 25 x 25 x 5 cm is a foam pad designed for aquarium filtration that combines mechanical debris removal with biological filtration capacity. The fine-pored structure traps small particles while providing a large surface area for colonisation by nitrifying and other beneficial bacteria. The 25 x 25 x 5 cm size fits many internal and external filter housings as well as custom DIY filter boxes and media compartments, and is suitable for both freshwater and marine aquaria where a fine foam pad is needed.
Advantages
The fine-pored foam captures suspended particles and reduces mechanical load on downstream filter media, extending the service life of other cartridges and chemical media. Its open-cell structure supports stable bacterial colonies for biological filtration and contributes to ammonia and nitrite conversion. The pad is easy to cut to shape for different filter housings, lightweight, and washable for repeated use, helping to maintain consistent water clarity and quality when rinsed correctly.
Suitable for
 Internal and external aquarium filter inserts and trays
 DIY sump and filter box media layers
 Freshwater community tanks and planted aquaria requiring fine mechanical filtration
 Marine and reef systems where gentle mechanical filtration is needed
Key specifications
 Material: fine-pored open-cell foam suitable for biological colonisation
 Dimensions: approximately 25 x 25 x 5 cm
 Pore structure: fine pores designed to trap small particles
 Compatibility: adaptable to most filter housings and custom media compartments
 Maintenance: washable and reusable with proper rinsing
How to use
Select a location in the filter flow path where the sponge will intercept suspended solids without blocking water flow excessively. Trim the sponge to the required shape and fit it into the media tray, filter cartridge slot, or DIY compartment. Place the pad upstream of chemical media to protect them from clogging and downstream of coarse mechanical media when staged filtration is used. Rinse the sponge gently in dechlorinated or tank water during maintenance to remove trapped debris while preserving beneficial bacteria; replace only when structural breakdown or irreversible clogging occurs.
Usage recommendations
For optimal biological performance, perform maintenance using aquarium water and avoid aggressive squeezing or cleaning with tap water that contains chlorine. Inspect the pad every 2–4 weeks for clogging in heavily stocked or heavily fed systems, and stage with coarse foam ahead of the fine-pored sponge in high-debris setups to extend intervals between cleanings.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All HAPPET products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized HAPPET service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12074255/67558741_large.webp