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Sponge filters are indispensable for any hobbyist or breeder. These dense foam sponges can harbor incredible quantities of beneficial nitrifying bacteria. Use them anywhere you keep
fish, one or two in small aquariums or multiples in larger tanks. Always keep extras going in your tanks, to speed up the cycling of new aquariums just by moving a mature sponge. An inexpensive remedy for
overcrowding or inadequate filtration may be as simple as adding 1 or 2 Hydro-Sponges! Additional quantity discounts available. PARTS AVAILABLE as well as stackable units and
pre-filter sponges only. see below listing
Pancake style sponges for fry feeding and hiding. Large surface area on these sponges give fry plenty of room to forage for food particles and
Hydro-V-Mini, (pancake style) single base unit only
Hydro-V-Mini STACKABLE Sponge and parts only to add 1 stacked sponge to an existing complete filter. Image above triple requires one base unit and two
Hydro-Flo-Sponge Sponge Filter specially fitted with a miniature water
pump Use fine sponge filter for polishing water or in small aquariums can replace air driven style to eliminate bubble noise or when desired for gentle water movement such as planted tanks. Use
coarse sponge to provide longer service life between cleanings or when higher flow rates are desired. Coarse foam sponge works well as mechanical filtration as well as biological. Mini pump sits
attached to top of lift tube allowing flow to be directed upwards for better turnover. Pump can also be optionally adapted to 90 degree using HS-EL elbows. Larger HSFP300D with 296 gph pump for high
turnover heavily populated aquariums.
Hydro-Flo mini Sponge Filter, single #0 coarse sponge 2 3/4” dia x 2” high sponge w/ 30 gph pump Useful
for small nano or planted tanks where very limited flow rate is desired and limited biological capacity. horizontal outlet with slow water movement to direct nutrients throughout tank limiting surface
agitation for minimal gas exchange.
Hydro-Flo mini Sponge Filter, single #2 coarse sponge 2 3/4” dia x 4” high sponge w/ 30 gph pump Same as above but using 4” high sponge
Hydro-Flo Sponge Filter, single #2 coarse sponge 2 3/4” dia x 4” high sponge w/ 50 gph pump
Hydro-Flo Sponge Filter DOUBLE HEIGHT SPONGE w/ Quiet One 1200, 296 gph powerhead Includes outlet elbow and Flexible Ball Socket joint tubing and
nozzle for adjustable flow direction.
Provides large filtration capacity: over 200 cu. inches of biological/filter area. More than most hang on back filters!
Combined with high volume water pump and no head loss from suction tube will provide more turnover than many filters advertising higher gallons per hour.
Hydro-Flo Triple Horizontal filter 325 Gallon per Hour Mounts horizontal on bottom of aquarium or in sump, Ball/Socket fitting outlet to direct
flow Uses our PFP pipe for secure mounting of inlet sponges and extra outboard foot support
Coarse Foam Sponge for use as pre-filters on intakes of Water Pump intakes, Power Filters, Cannister Filters, Wet-Dry intakes, Bulkhead fitting intakes or anywhere particulate needs to be screened or
intakes diffused to prevent small fish or fry from entering intake tubes. Higher flow rate intakes generally require larger sponges with greater surface area to prevent suction effect of intake. Either
use a PVC “Tee” inlet with multiple small sponges or 1 larger sponge when this is a concern. Filter-Max
III come with multi size adapters for various intake tubes of commercial aquarium filters such as Power Filters etc. These Filter Max do not have adapters for PVC pipe sizes. For adapting sponges to PVC use
any of the other pre-filters which are made to fit on common schedule 40 PVC pipe fittings. The “HS
-PF90” style shown above have a right angle elbow and all clear fittings. Pre-filters with “mini” sponges
are half the regular length sponge and are usually adequate for up to 200 gallons per hour flow rates. For highest flow rates use extra large Hydro-Pond style Sponges #HS-PIII & #HS-PIV (same size
sponge as Hydro V filters but in a coarse foam)
Filter Max III Pre-filter complete with multiple adapters and 2 elbows for adjusting away from tank wall. Fitted with coarse Pro
Series sponge 2 3/4” dia x 4” long
Filter Max II Pre-filter complete with multiple adapters and 2 elbows for adjusting away from tank wall Fitted with standard fine
pored sponge 2 3/4” dia x 4” long sponge
Filter Max I Pre-filter complete with multiple adapters and 2 elbows for adjusting away from tank wall Fitted with standard fine
pored sponge. 2 3/4” dia x 2” long sponge
Pre-Filter w/ 90 degree elbow and Mini size sponge, 3/4” male PVC adptr.
Pre-Filter w/ 90degree elbow and regular size sponge, 3/4” male PVC adptr.
1/2” clear adapter to fit into above 3/4” (PF90 series)
Pre-Filter w/ Mini Sponge and 1/2” straight PVC adptr.
Pre-Filter w/ Mini Sponge and 3/4” straight PVC adptr.
Pre-Filter w/ regular sponge and 1/2” straight PVC adptr.
Pre-Filter w/ regular sponge and 3/4” straight PVC adptr.
Hydro-Pond Sponge #3 Water Pump driven style multiple adapters for various pump intakes, 2 elbows for offset, and single coarse
foam Hydro Pond sponge. (4” long x 5 3/4” dia. coarse sponge)
Hydro-Pond #4 Water pump driven style (2) Hydro-Pond Sponges Multiple adapters for various pump intakes, 2 elbows for
offset, and 2 coarse foam Hydro Pond sponges. (8” long x 5 3/4” dia coarse sponge)
Large Pre-filter Stacks for overflows. Use on pre-filter overflow boxes or directly on pump intakes on submersible
pumps or thread into bulkhead fittings on sump. We can also provide different custom size adapters to fit your needs.
Prefilter Sponge only Coarse Sponge sleeve for pre-filter use will fit on screen tube PFP144 below 1” ID core x 3 1/2” OD x 10” long
Prefilter intake assembly for water pumps
Prefilter replacement sponge for above PFAT-4X6 coarse ~15 ppi reticulated foam 4” dia x 6” long x 1” core
Pre-filter screen tubes for custom pump intakes or overflow stacks
Provides a more secure method of attaching sponges to pump intakes, no parts to fall apart.
PFP108 and PFP-244 series will fit directly into PVC socket fittings (not glued). Simplifies pre-filter installation using standard PVC
fittings.Leave open screenin without sponge for a screened pump intake or even use as bulkhead fitting intake screen, with or w/o a sponge. Use PFS-110 sponges or Hydro-Pro series replacement sponges for
FP-144 and PFP-244 series PVC pipe fits snugly inside providing a myriad of uses as pre-filter screens or for wrapping with blue bonded sheet or filter felt sponges. 1” size fits
PFS-110 sponge or Hydro-Sponge replacement sponges. Provides a more secure method of attaching sponges to pump intakes, no parts to fall apart. Generally parts are not glued, however PVC elbows and pipe can be
glued for a permanent installation.
We can supply complete assemblies as shown below or to your dimensions as required. Please inquire.
Use as single intake for pumps up to 1000 gph
Use as dual intake for pumps 1000 gph and larger
1” screen pre-filter pipe x 10 1/2” long fits into female PVC socket fittings for simple installation of
prefilter use PFS-110 sponge or Hydro-Pro series sponges
1” screen pre-filter pipe x 42 1/2” long fits into female PVC socket fittings for simple installation of
prefilter - use PFS-110 sponge or Hydro-Pro series sponges
End Cap for above PFP115 series screen pipe fits inside screen pipe eliminates the need to use PVC slip cap
End Cap for above prefilter pipe fits #PFP-115115W & PFP115425W soft cap fits over end of pipe
1” pipe size screen tube x 44” long fits snugly over 1” PVC pipe Schedule 40 or Schedule 80
End Cap for above PFP 144 screen pipe - fits inside eliminates the need to use short piece of PVC pipe and PVC slip cap
2” pipe size screen tube x 44” long fits loosely into 2” PVC pipe socket fittings (female fittings) S40 & S80 (use silicone glue or a thin sleeve for better fit) pipe also fits over sponges #H-0, #H-II and Filtermax 3 #HS-PF-FM3 sponges to prevent fish such as plecos, eating
2” end cap/plug for above PFP-244W
ATI Hydro-Sponge Replacement Sponges & Parts
Hydro-0 Replacement Sponge
Hydro-1 Replacement Sponge
Hydro-1 PRO (coarse) Replacement Sponge
Hydro-2 Replacement Sponge
Hydro-2 PRO (coarse) Replacement Sponge
Hydro-3 Replacement Sponge
Hydro-3 PRO (coarse) Replacement Sponge
Hydro-4 Replacement Sponge
Hydro-4 PRO (coarse) Replacement Sponge
Hydro-5 Replcement Sponge
Hydro-5 PRO (HydroPond Replacement Sponge Coarse Sponge)
Hydro V Mini (Pancake Sponge) Replacemnet Sponge
Filter Max 3 Replacement Sponge
Hydro Sponge Pre-filter Mini Replacement Sponge
Hydro-Sponge Parts (listed in order of assembly - from bottom up) more parts available - call
Weighted Base for Hydro-Sponge air driven filter
Adapter or Step (riser spacer)
Female Strainer - grid with flange which holds sponge use this one singly for H-0 or H-I or H-VM
Male Strainer - grid with flange which holds sponge mating piece with HS-FS
Bullseye connector - attaches to flange side of either strainer HS-MS or HS-FS - where airline tubing connects to - has 3 spokes
Lift tube - clear plastic rigid tube ~ 1” diameter connects to bullseye connector 5” long lift tube
Lift tube - same as above but shorter length for H-I to allow H-I to be used in shallow tanks such as 10 gallon and smaller ~
3 1/2” long lift tube
Lift tube for H-0 and HS-VMS- shorter lift tube for smaller tanks such as plastic holding tanks, bowls, etc. ~ 1 1/2“
long lift tube
Jungle Dirt Magnet Sponge Filters These smaller sponges can work well in small aquariums, bowls or plastic holding tanks such as our HTN series. Effective even with very low water levels due the low profile of these filters.
“Junior Dirt Magnet” round sponge filter for up to 10 gallon aquariums
“Senior Dirt Magnet” triangular sponge filter for up to 25 gallon aquariums
Hatchery Dirt Magnet
BULK Reticulated Filter Foam Foam sheet to make home-made sponge filters and Matten style in-tank filters
1/2 and 1/4 sheets available - CALL
COARSE 15 PPI
39” x 39” x 2” thick, coarse
39” x 39” x 4” thick, coarse
MEDIUM 30 PPI
39” x 39” x 2” thick, MEDIUM
39” x 39” x 4” thick, MEDIUM
FINE 40 PPI
39” x 39” x 2” thick, FINE
39” x 39” x 4” thick, FINE
Wall Mounted Air Driven Sponge Filter
Nano-Sponge filter suction cup mounts for tank wall mounting 2 sponges ~1 3/4” dia x 3” tall Overall
width ~6” x ~ 7” tall fits slim against back or side wall protrudes less than 2” from tank wall.