Tunze

Tunze Osmolator Universal 3155 Auto Top Off ATO

$199.99  

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The TUNZE Osmolator 3155 is an automatic top off (ATO) system for marine and reef aquariums. The Osmolator – short for Osmotic Regulator – automatically adds freshwater to compensate for evaporation in your saltwater aquarium.

The high-tech German designed Osmolator uses a precision optical sensor to measure the water level. Water continuously evaporates from the aquarium, leaving the salts behind. This causes the salinity to increase. When you manually pour in water the salinity is suddenly decreased. This “salinity rollercoaster” stresses the fish and invertebrates by causing extreme fluctuations in osmotic pressure.

The Osmolator puts an end to this by continuously sensing the rate of evaporation (water level) and adding back the right amount of freshwater. This brings osmotic stability to the aquarium and keeps your sump and aquarium water at the right level.

Here’s what we really like about the Osmolator:

  • TUNZE invented the ATO and has been perfecting it for 30 years
  • Precision optical water sensor detects the slightest change in water level
  • Easy to install and adjust using the Magnetic Sensor Mount
  • Status lights display functions and sounds a warning in case of trouble
  • Built-in safety features prevent overfilling of the aquarium and shuts the system down
  • Comes ready to install – all you need is a reservoir or bucket

The Osmolator can be used on any aquarium, even freshwater tanks. It works when installed inside the aquarium on tanks without a sump. If you have a sump the sensor must be installed there since that is where the water level changes as it evaporates.

Features:

  • Complete kit with power supply, metering pump, hose and sensor mounting system.
  • The water level sensor has no moving parts to wear out and is not affected by suspended dirt, light or magnetic fields.
  • Optical sensor ignores gentle water movements caused by wave makers and circulation pumps.
  • An independent safety sensor with a separate power supply circuit and relay ensures reliable overflow protection.
  • A microprocessor monitors the water level in the reservoir and prevents the pump from running dry.
  • All functions are clearly displayed by colored LEDs and warning signals.
  • The Osmolator uses ultra-low voltage for complete safety.

For smaller aquariums, check out the Tunze Nano Osmolator 3152. If you need a container to hold your top off water, the Tunze Osmolator Storage Container 5002.25 is an ideal choice.

Specifications:

  • Metering pump flow rate based on pumping height: 3 feet:13.7gph, 5 feet:12.4gph, 6.5 feet: 7gph, Maximum pumping height: 7.22 feet
  • Magnetic Mount System: Maximum glass thickness ½ inch
  • For indoor use only
  • 2-year warranty

Product Manuals & Documentation

Tunze Osmolator Universal 3155 Auto Top Off ATO

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

Tunze
For forty-five years the name TUNZE® has been synonymous with aquariums. Many products and components which we have developed in the course of time are now standard features of aquarium technology today. This confidence in TUNZE is no coincidence. The company has remained true to its philosophy right from the beginning, researching water biotopes all over the world to develop components which enable natural water conditions in the closed environment of an aquarium. In the implementation of know-how, effectiveness and efficiency, TUNZE® takes the lead in environmental compatibility. Their motto is: quality and reliability. These values are upheld with well thought-out and precise tool making by highly qualified experts. The brand names of TUNZE® and Turbelle® meet the expectations of the seal of quality; Made in Germany. Many of the products shown in this catalogue are protected by national and international patents.


Warranty

Manufacturer`s Warranty: 2 years from date of purchase.

Ask a Question Earn 15 Points when you answer a question
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9 Questions
Displaying questions 1-9
 
Q
I have the tunze 5017 ATO the control board went in my sump . Can I get just the control box if so how much?
Asked : Feb 17, 2018
By : Phil Corless, Abbotsford bc
 
 
 
Q
Dimensions of pump?
What is the diameter of the pump?
Asked : Oct 24, 2017
By : Salina Reefer
 
 
 
A
Thank you for your question. The diameter of the pump is 1.8 Inches / 4.6 cms.
Answered : Oct 27, 2017
By : MD Tech
 
 
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Overall, others give this:

  • 4.5

118 Reviewers (93%) would recommend this

Overall Rating:

download image
5  Star
 84
4  Star
 22
3  Star
 6
2  Star
 2
1  Star
 4
 
5
5.0
Nothing better

reviewerbadge
PROS
Reliable
CONS
None
REVIEW
This review is simple. I’ve had this on an aquarium for 3 years now and have never touched it except to change where I wanted the water level.
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
It does the job

reviewerbadge
PROS
It has everything you need to make an ATO outside of a container for water. An alarm if something goes wrong. Can turn off the alarm sound if you dont want it. It is pretty quiet.
CONS
Had an issue getting the controller apart to remove the jumper because my girlfriend hates those alarm noises. But other than that, no other issues from me. Love it.
REVIEW
Now I just installed this over a week and a half ago. But I can say that it has done its job since day 1! Easy set up was another huge selling point. It is highly recommended for a reason. If you need and ATO system, buy this one!
  • 1
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5
5.0
You Can’t Go Wrong w/ A Tunze Osmolator

reviewerbadge
PROS
Accurate Optical Water Sensor and Loud Over Flow Switch
CONS
Loud Pump
REVIEW
I have had the same Tunze ATO for over 14 years. The only thing I have had to replace was the pump which was about 9 years ago. The Tunze 5017 Controller has not changed, therefore, it would not be such a stretch to believe this latest Tunze ATO model 3155 would perform any less.
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
5
5.0
Tunze Osmolator Universal
reviewerbadge
PROS
Reliable
CONS
None so far
REVIEW
Great ATO. Ive been using it now for a few months and I love it.
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
5
5.0
Tunze Osmolator Universal 3155
reviewerbadge
PROS
Reliable
CONS
expensive
REVIEW
Great ATO. Had it running for 2 years now and no problems!
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
4
4.0
Great
reviewerbadge
PROS
works well on smaller tanks. I use a different system on my 300 gallon to do water changes and supply old water to quarantine tank.
CONS
pump is limited by design and can transport short distances
REVIEW
This ATO works very nicely and is ready to use with a few simple installation steps. It comes with everything (ie. pump and tubing) so all you have to do is drop the pump into your water reservoir, set the sensor, and plug in the ATO.
  • 1
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5
5.0
Most recommended?
reviewerbadge
PROS
Complete adaptable solution
CONS
Let you know
REVIEW
Purchased because it was recommend by several
Talking heads on those tutorials. As a controls designer I could see the improved sensor capabilities and functionality along with the motor and all the parts to complete the project.
  • 1
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Write Your Review Earn 15 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.5

118 Reviewers (93%) would recommend this

Overall Rating:

download image
5  Star
 84
4  Star
 22
3  Star
 6
2  Star
 2
1  Star
 4
 

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