Hydro Filter Replacement Sponges


Replacement sponges for the Hydro Sponge Filter

ATI Hydro Filter Sponge Replacements

These are the sponge only replacements for the ATI Hydro line of sponge filters.


  • Capable of moving more water than other sponge filters.
  • One inch diameter lift tube allows use of power head* without adapters.
  • 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.
  • *powerhead and airstones are not included


Description Sponge Size Tank Size Surface Area (inches)
Hydro I 2 x 3-3/4 >10 gallons 46.1
Hydro II 4 x 3-3/4 >20 gallons 48.4
Hydro III 4 x 3-3/4 >40 gallons 74.4
Hydro IV 4 x 4-3/4 >80 gallons 104.7
 Hydro V 4 x 5-3/4 <125 gallons 138.4

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