Contest Time! Win a $300 new HOG3 scrubber.


Active Member
8 April 2015
Santa Monica, California, USA
Can you figure out what happened to this HOG3 upflow scrubber? It was brand new when installed, but the user did something that caused this to happen (see photos).
The contest person who guesses what happened most accurately will win a new HOG3 shipped anywhere in the world (winner supplies his own air pump, and pays any customs / import / duty fees if out of USA).

To enter, post below and describe what you think happened, and include:
Name, City, State, Country.

Or you can post on our forum here:

Contest ends April 30, 2019. Here is the new item: ...

Hope you win!

hog3 context.jpg hog3 contest big.jpg hog3 contest med.jpg


Active Member
19 February 2018
i think he puts some plastic stuff covering the leds, thinking this was going to protect from water or something like this. im saying this cause this orange thing looks like melted plastic for me, rsrsrsrs.

Luis Carlos Vitorino Pacífico, Guaratinguetá, São Paulo, Brasil


Active Member
19 February 2018
hmm im previously understood wrong how the hog3 works, the leds part are atached on the other side of the glass, no contact with water, so i dont think anymore he did something thinking to protect the leds from water, but it still looks like melted plastic for me, kkkkk....maybe are mushrooms....dont say to me the guy did "feed" the plants?.....kkkkk

Luis Carlos Vitorino Pacífico, Guaratinguetá, São Paulo, Brasil


Active Member
8 April 2015
Santa Monica, California, USA
Ok, the winner is....

Jeff Bednarek:
"Looks like output holes got clogged and exposed too much air to the top half. Then the lights cooked the moist algae in the air pocket"
Clay, NY, USA

And the almost-winners are...

David Price:
"I believe what happened is the filter screen got clogged with too much algae not allowing enough water to flow through the area that turned yellow/brown color causing the algae in that area to die."
Cranberry Twp. PA USA

Tiago Gomes Silva Simões:
"Overgrown and clogged. But it had to be like that for a long time"

Josh Graves:
"Went without maintenance for 8 months"
north port Fl USA

Gareth Barber:
"Water level dropped and light cooked and dried the algae"
Gareth Barber, Wauchope NSW Australia

Here is what happened: I installed this unit on a large tank myself, and made sure the light timer was 18 hours, and the bubbles were 24 hours, and the shade cloth was half covering the lights. After 3 weeks the cloth was removed and growth continued to get thicker. The person running the tank said he would handle the cleaning thereafter. I finally heard from him 6 months later, saying this photo is how it looks today, on its very first cleaning. Yes, first cleaning. So it had not been opened or adjusted for 6 months.

So the growth got heavy inside and blocked to the top air hole, which caused an air pocket to push the water down halfway. The top half then got more light and less water, and grew thick slime (which is still alive and removing nutrients from the water). And around top air hole you can see how the slime let go and started to fall down, but the Green Grabber rocky textures still held it in place without letting it float away. Also this amount of slime is rarely seen on waterfall scrubbers, because their smooth screens and the weight of the algae causes the slime to let go. But the Green Grabber rocky textures hold on.

The strings are visible, which many people thought were worms or anemones. No, just strings holding on to growth. The strings don't hold slime as well as the rocky textures though, which is why strings are recommended for saltwater only (the slime in freshwater does not need strings). The bottom half was growing normally, and even started to pull upwards on the bottom section because there are no textures there, just smooth plastic.

Here are the remaining entries....

Sirrahn Nelms Was Donohue:
"Lack of water flow and too much light"
Plymouth, uk

Richard Miller:
"The user put a soft coral (leather frag) inside the unit and tried to grow it out? Supply pump was off for several days causing zero oxygen levels and then restarted"
Port Saint Lucie FL USA

لؤي خليف
"Make the half in the water and the other half out of the water ... and leave it clean for a long time"
luay khalifa, Germany

Phil Peekay Kent:
"They thought the food rating was how much food the scrubber needed and were adding food directly into the chamber"
Brisbane, Qld, Australia.

Tommy Filthiest Hua:
"Half the LED panel died and was only lighting half the algae"
Sydney NSW Australia

Dwight Whitey Burgess Jr:
"Not enough air in that area"
Baltimore md., Usa

Jesse Boyko:
"Didn't properly clean it the first time. Not enough light?"

Joshua Benson:
"Used vibrant to get rid of bubble algae and nuked the algae in it"
Josh Benson Bristol WI USA

David Wiseman:
"Looks lack of water flow and the light caused bacteria bloom"
David Wiseman. Nv usa

Travis Lund:
"Was trying to get more nutrients into the system by dosing and overdid it"
Hampstead NC, 28443

Michal Fessler:
"Did not clean it with in the recommend 2 weeks. As well as light on for 24 hours"
Macomb Mi, 48044

Jim Hart:
"Some type of zoas tried growing in it,my guess, they got sucked in or were mistakenly placed in"

David Schaelling:
"Had it mounted in the tank instead of the sump, was not flat against the glass/acrylic, anemone found a way in and rotted away"
Astoria, Or

Brandon Pfeiffer:
"Seeded it with their own mangroves"
St Louis MO

Ian Pollock:
"Calcium doser to close to input, Causing calcification"
Bath, Uk

Bosco Octave:
"The water was rich in nutrients and the tank received no or inadequate water change. The unit may have been on 24/7 and/or the aeration was not adequate in the unit or water flow out of the unit was restricted."
Ameya Gudekar, Melbourne, Australia

Chris Downs:
"The batteries on the auto feeder were dying and it dumped all the pellet food out."
Chris Downs Bohemia NY, USA

Mark M. Davis:
"Forgot to turn on half the lights. Mark M. Davis Tucson, Arizona"

Mark Brown:
"Not enough water flow and did not clean it properly"
Massachusetts usa

Mike Schell:
"Over dosed carbon dosing. Mike schell Kindred, ND U.S.A."

Tyler Westover:
"Slime not removed and overgrew"
Spanish fork, UT USA

Lisa DiMercurio"
"Are those worms?"

Devon Murby"
"Power loss"
Attleboro Massachusetts United states

Robert Fowler:
"Im gonna guess too long of a photo period or they didnt properly acclimate the lights."

Nick Ellis:
"It looks like someone shut off the return pump for maintenance and forgot to turn the heater and lights to the scrubber off which boiled the water and algae"
Akron, Ohio USA

Jordan Mullan:
"Air pump was below aquarium. Water got into line. No flow, so algae got gross"

Andrew Nolan Calvo:
"Looks like the water Sat stagnant and went anaerobic"

Mathieu Poulin:
"Stop cleaning it and let thé light on"
Canada, Québec

Eric Barello:
"Looks like it sucked up some kind of sponge that grew and restricted flow and the top area was exposed to oxygen for too long"
Harford county maryland.

Nickolas Brock:
"Voltage leak"
Jacksonville Florida u.s.a.

Jeff Larson:
"I think he left the lights on for to long"
Marquette Michigan

Matt Green:
"Put too strong of an air pump on it"
Tucson Arizona

Joshua Mummery"
"Inserted their own macro algea and had a major bloom"
Tucson Arizona

Jim Stime Jr:
"Allowed the water level to drop too low"

Spot Oliver:
"The salinity of the aquarium was above 1.035 causing odd algae in a tropical water system, or it’s from a cold water system that didn’t have a properly Calibrated refractometer based on water temp."

Samantha Nicole:
Left lights on 24/7

Jonathan Jones:
"Looks to me like it just sat in a shut off tank. Then died an molded"
El Reno, Oklahoma

Jason Teed:
"He placed it in his sump by his refrugium, and set the timer opposite of the light for his refrugium"
Washington twp, mi, United states

"This looks like too much light or too much air coming in"

Run out of water and dry out; Supply water problem

Placed it flat with not enough flow instead of vertical? Not enough light also.
Fullerton, ca

Luis Carlos Vitorino:
"Looks like melted plastic"
Pacific, Guaratinguetá, São Paulo, Brazil

"Too much light, and not enough dark hours"

"Did not clean it"

No air pump

"Looks moldy, not enough water running through it"
Gaston, Oregon

"Not enough flow because it was not cleaned"
Cornelius or.

Mesamech "
"The LED lights were not covered with cloth during initial start up. I used too small scrubber for the amount of nutrients run in his system."

householdofpayne "
"Used with nopox"

"Ran 24-7 without clearing off the algae growth"
Milwaukie, Oregon

BeardUp "
"Lack of cleaning which leads to lack of flow and build up of temp."

"Clogged / not enough flow"

Did they have an improper water level? Either from evaporation or from installing it properly from the start?
Lafayette IN, USA.

Membros que estão vendo este Thread (Membros: 0, Convidados: 1)

Top Bottom