Classic Protein Skimmer HOB (5 models available)

Over a decade of proven reliability.”

Did you know?

We are the first protein skimmer manufacturer in the world that designs and produces our own skimmer pumps. Our skimmer pumps have been specifically engineered to enhance and increase the efficiency of our protein skimmers.

Product Name: OCTO Classic Protein Skimmers HOB

Model/Type:Hang-On Skimmer

Series: OCTO

Model No.: Classic 90-HOB, 1000-HOB, 2000-HOB, 100-HOB, Classic NS-80

Features & Benefits

  • Low profile body
  • Air Silencers
  • Single output
  • Solid Acrylic Construction
  • Adaptive Surface Water Degreasing function
  • Powered by our very own Aquatrance pump
  • Dual Chamber Reaction for specific models


Reef Octopus Hang-On Back Classic skimmers are a proverbial favourite. With its unique design, the pump is mounted externally and under the actual skimmer body (90-HOB,1000-HOB and 2000-HOB)allowing for much less room needed behind the aquarium and less heat-to-water exchange.

The OCTO Classic series HOB is constructed of high-quality acrylic and equipped with the new highly efficient Aquatrance pinwheel pump that produces an ideal mix of water and air for optimal waste removal.

What's included

Article CodeItemsClassic 90-HOBArticle CodeItemsClassic 100-HOB
Model No.QtyModel No.Qty
aTop Cover1aTop Cover1
bCollection Cup1bCollection Cup1
cPlug1cO  Ring1
dO Ring1dSkimmer Body1
e1Silencer1eO  Ring2
fWater inlet 011gAir hose1
gO Ring2hSurface Water degreasing1
iWater inlet 021jSkimmer Pump1
jO Ring2kWater inlet pipe 011
ladjusting pipe1mO  Ring1
mO Ring2nUnion1
nScrew2oWater inlet pipe 011
oWater outlet1pwater inlet  part 021
qDefoaming device1rScrew2
rUnion1sWater outlet part 011
sSkimmer Pump1tPipe1
tO Ring1uSponge1
vDefoaming device1


Article CodeItemsClassic 1000-HOBArticle CodeItemsClassic 2000-HOB
Model No.QtyModel No.Qty
aTop Cover1aTop Cover1
bCollection Cup1bCollection Cup1
iSkimmer Pump1iSkimmer Pump1
jO Ring1jO Ring1
kWater inlet 011kWater inlet 011
lO Ring2lO Ring2
mSkimmer Body1mSkimmer Body1
nWater inlet 021nWater inlet 021
oSurface Water degreasing1oSurface Water degreasing1
pO Ring1pO Ring1
q1Water oulet part1q1Water oulet part1
q4Defoaming device1q4Defoaming device1
rWater inlet 021rO Ring2
sO Ring1sWater inlet C1
tVenturi1tO Ring2
uO Ring1uVenturi1
vAir Hose1vO Ring1
wAir Valve1wAir Hose1
xSilencer1xAir Valve1


Technical Data

ProductWet/DryFit PumpAir IntakePowerMaximum Flow RateOutput SizeTank Volume
Classic 90-HOBDryAQ-1000S420111454120893509235092ø32 mm300-50079-132
Classic 1000-HOBDryAQ-1000S420111454120893509235092ø32 mm300-50079-132
Classic 2000-HOBDryAQ-2000S7201907191901718750198750198ø40 mm500-800132-211
Classic 100-HOBWetAQ-1000S420111454120893509235092ø25mm50-40013-105
Classic NS-80WetOTP-200S5520052.820052.8ø16mm0-1000-26

Explosion Charts


Explosion Chart for Classic 100-HOB

 Explosion Chart for Classic 100-HOB


Explosion Chart for Classic 90-HOB

Explosion Chart for Classic 90-HOB

Explosion Chart for Classic 1000-HOB

 Explosion Chart for Classic 1000-HOB

Explosion Chart for Classic 2000-HOB

Explosion Chart for Classic 2000-HOB

Explosion Chart for Classic NS-80



Not Available