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Hydro PRO Sponge Replacements

  • Hydro Sponge Filter Replacements
  • Hydro Sponge Filter Replacements
Calculated at checkout

Product Description

*NOTE: these are the replacement sponges only.

Reticulated foam sponge filters enhance aquarium biological filtration. Hydro-Sponge Pro Filters are upgraded to double the efficiency of the popular ATI Hydro-Sponge Filter. Versatile reticulated foam sponge filters handle higher flow rates without clogging, making it the ideal choice for use with aquarium powerheads. Durable reticulated foam is longer-lasting and is easier and faster to clean to ensure reliable performance.

The difference between the regular and Pro versions is the porosity of the foam. The Pro Series is designed to take a power head as a replacement for the air supply, if you need greater throughput. With larger pores, the Pro series won't clog as quickly.

Hydro-Sponge Pro Filters provide both mechanical and biological filtration. Raised filter sponge maximizes surface area exposure to optimize bacterial colonization and efficient breakdown of toxic ammonia and other nitrogenous waste. Weighted base allows for easy placement while preventing drifting. Use with an air pump or attach a powerhead to the included one inch diameter lift tube to suit your filtration needs. Modular design allows for stacking of multiple units to increase filtering capacity.


  • Redesigned aquarium sponge filters for improved bio-filtration
  • Use reticulated foam filter with higher flow rate powerheads
  • Beneficial bacteria colonize sponge filter for waste breakdown
  • Raised off bottom, no dead space.
  • Heavier base.
  • Can be used with or without an airstone.*
  • Easy to clean. Just rise and squeeze under cool running water.
        *not included

Hydro-Sponge Size Comparison


Sponge Size (inches)

Tank Size

Surface Area (SQ. IN)

Hydro-Sponge II

4 x 2 3/4

>20 gallons

Single (49.4)

Hydro-Sponge III

4 x 3 3/4

>40 gallons

Single (74.4)

Hydro-Sponge IV

4 x 4 3/4

>80 gallons

Single (104.7)

Hydro-Sponge V

4 x 5 3/4

<125 gallons

Single (138.4)

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