TUNZE Osmolator Automatic Water Top-Off

TUNZE Osmolator Automatic Water Top-Off

AutoTopOff by TUNZE

23 ratings

Used in 632 aquariums

View products
By blaise282003 on September 23, 2024
By chriskq89 on June 11, 2024
By nickm on February 10, 2024
Best top off in the business! Bought one used and it’s still going strong.
By flagstone01 on February 3, 2024
By munne on January 25, 2024
By lipman on January 21, 2024
I'm definitely running into a few issues, and the pump has died twice but overall a great product
By don5049 on December 29, 2023
By jstansell on July 13, 2023
By hbsyddall on June 4, 2023
By dboulware on April 26, 2023
By bades on April 14, 2023
By alexandreads on March 15, 2023
By lucask on March 8, 2023
By mchans_99 on November 9, 2020
By chiefreef on October 10, 2018
Great ATO. The mounting bracket is a little large when mounting in display tank.
By asdtank on June 22, 2018
The only ATO you should ever buy. It's bulletproof.
By axthoxy on March 23, 2018
I like it, but the mounting magnet is huge
By echogi on March 9, 2018
perfect tool to make life easier
By pjvalencia on July 30, 2017
it wasn't the best, but it worked. it could be better
By adammahne on May 7, 2017
By dropped on January 14, 2017
Great, has never failed on me.
By carlonaz on January 10, 2017
Most trust worthy in my opinion
By dtum on January 7, 2017
Trusty Auto Top Off that is still working many years later.

Some of the 632 aquariums that use TUNZE Osmolator Automatic Water Top-Off

TinPan's Reef Thumbnail
tinpanva TinPan's Reef 29 Gallons
4 years, 3 months
Atoll M60 Part 2 Thumbnail
mangups Atoll M60 Part 2 24 Gallons
23.6'' x 16.5'' x 15.7''
9 years, 1 month
Fluval M60 24g Thumbnail
schroetj Fluval M60 24g 24 Gallons
23.6'' x 16.5'' x 15.7''
3 years, 9 months
RSM 130d Thumbnail
lyall12 RSM 130d 34 Gallons
9 years, 1 month
225 SPS Dominant Thumbnail
djkms 225 SPS Dominant 225 Gallons
72'' x 27'' x 27''
1 year, 6 months
Fermon's reef Thumbnail
fermon2 Fermon's reef 300 Liters
120cm x 50cm x 50cm
2 years, 10 months
Oceanic 57 Thumbnail
elwallacejr Oceanic 57 57 Gallons
36.5'' x 18'' x 21''
1 year, 3 months
2901reef Thumbnail
ventino 2901reef 250 Liters
960cm x 552cm x 665cm
5 years, 13 days
this 120 Thumbnail
j0359m this 120 120 Gallons
48'' x 24'' x 24''
7 years, 4 months
Envisage Reef Thumbnail
btibbetts Envisage Reef 34 Gallons
11 years, 11 months
LPS minimalistic reef Thumbnail
maga LPS minimalistic reef 65 Gallons
7 years, 8 months
Da Reef Thumbnail
bertl Da Reef 201 Gallons
54'' x 30'' x 24''
2 years, 5 months
Sharks 120 Mixed Reef Thumbnail
flsharkvictim Sharks 120 Mixed Reef 120 Gallons
48'' x 24'' x 24''
15 years, 7 months
SPS Reef Thumbnail
dropped SPS Reef 330 Liters
100cm x 60cm x 55cm
3 years, 8 months
5x2x2 starfire lps reef box Thumbnail
chrisneill1987 5x2x2 starfire lps reef box 500 Liters
150cm x 60cm x 60cm
11 years, 10 months
The Mulberry Tree Thumbnail
reefguy The Mulberry Tree 780 Liters
150cm x 65cm x 80cm
12 years, 9 months
My 1st Reef Aquarium Thumbnail
bluethumb My 1st Reef Aquarium 65 Gallons
36'' x 18'' x 24''
9 years, 5 months
112g Thumbnail
bsmooth 112g 112 Gallons
50'' x 26'' x 20''
11 years, 1 month
New Nano Thumbnail
tomduud New Nano 160 Liters
100cm x 40cm x 40cm
9 years
55 Planted Thumbnail
thylocene 55 Planted 55 Gallons
48'' x 12.5'' x 21''
2 years, 1 month
Sparty's Fusion Reef Thumbnail
spartytim Sparty's Fusion Reef 30 Gallons
15'' x 36'' x 13''
7 years, 8 months
124 sps Thumbnail
aqua80 124 sps 124 Gallons
50'' x 26'' x 22''
3 years, 8 months
Deepsea Aquatics 100 Gallon Thumbnail
jam583 Deepsea Aquatics 100 Gallon 100 Gallons
48'' x 20'' x 25''
10 years, 7 months
My 100 Gallon Reef Thumbnail
socalwire My 100 Gallon Reef 100 Gallons
72'' x 18'' x 20''
12 years, 11 months
BigBlue Thumbnail
vince76 BigBlue 90 Gallons
48.5'' x 18.5'' x 25''
11 years, 12 days
75 Gallon Mixed Thumbnail
lafanblue 75 Gallon Mixed 75 Gallons
48'' x 18'' x 21''
8 years, 8 months
Acroporero Thumbnail
fermon2 Acroporero 300 Liters
120cm x 50cm x 50cm
10 years, 4 months
20g Nano Thumbnail
chiefreef 20g Nano 20 Gallons
24'' x 16.8'' x 11.5''
1 year, 2 months
reef 35 Thumbnail
mangups reef 35 37 Gallons
30'' x 12'' x 22''
3 years, 9 months
Hex's Reef 2.0 Thumbnail
fishofhex Hex's Reef 2.0 180 Gallons
72'' x 18.5'' x 23''
1 year, 5 months
fishereef's 90 gallon mixed reef Thumbnail
fishereef fishereef's 90 gallon mixed reef 90 Gallons
48'' x 18'' x 24''
11 years, 4 months
My 66 gallon Aquarium Thumbnail
boboe77 My 66 gallon Aquarium 66 Gallons
32'' x 24'' x 20''
10 years, 2 months
Duckhams 40 Gallon Reef Thumbnail
darkwingduck Duckhams 40 Gallon Reef 40 Gallons
36'' x 18'' x 16.5''
8 years, 3 months
My Aquarium Thumbnail
willi My Aquarium 100 Gallons
60'' x 18'' x 21''
8 years, 6 days
Angel's Bay Thumbnail
yggdrasill Angel's Bay 450 Liters
10 years, 11 months
Saltwater Aquarium - Mixed Reef Tank Thumbnail
national_reefing Saltwater Aquarium - Mixed Reef Tank 105 Gallons
48'' x 18'' x 20''
10 years, 5 months
Red Sea Max Nano Thumbnail
mvalreef Red Sea Max Nano 20 Gallons
18'' x 18'' x 18''
11 months, 26 days
Joe's HOBby Thumbnail
ectogamut Joe's HOBby 43 Gallons
30'' x 12'' x 18''
9 years, 11 months
40B Frag Tank Thumbnail
kingblingtx 40B Frag Tank 40 Gallons
36'' x 18'' x 17''
8 years, 7 months
Bxer's Neo 105 Pro Thumbnail
bxer Bxer's Neo 105 Pro 105 Gallons
48'' x 24'' x 21''
9 years, 9 months
My Aquarium Thumbnail
nelreef My Aquarium 75 Gallons
48'' x 18'' x 21''
11 years, 9 months
Shroom Lagoon Thumbnail
btibbetts Shroom Lagoon 12.5 Gallons
18'' x 18'' x 9''
10 years, 5 months
Reefer 250 Thumbnail
echogi Reefer 250 250 Liters
90cm x 50cm x 53cm
3 years, 6 months
Ventino's reef Thumbnail
ventino Ventino's reef 422 Liters
120cm x 57.5cm x 55cm
5 years, 3 months
Shallow reef Thumbnail
djerry Shallow reef 300 Liters
150cm x 40cm x 50cm
7 years, 6 months
Office Tank Thumbnail
jmercer21 Office Tank 55 Gallons
48'' x 12'' x 18''
7 years, 4 months
Rimless Shallow Reef Thumbnail
kevin Rimless Shallow Reef 190 Liters
95cm x 50cm x 40cm
11 years, 5 months
150 Thumbnail
xxplastaxx 150 180 Gallons
72'' x 18'' x 28''
5 years, 3 months
Red Sea 130 Thumbnail
lobo2304 Red Sea 130 130 Liters
60'' x 50'' x 50''
8 years, 3 months
Winterfell Reef Thumbnail
dtum Winterfell Reef 100 Gallons
48'' x 24'' x 20''
3 years, 11 months
JBJ 30 rimless restart Thumbnail
cbwalker8 JBJ 30 rimless restart 30 Gallons
24'' x 16'' x 16''
1 year, 4 months
20G AIO Thumbnail
crockett 20G AIO 20 Gallons
23.6'' x 15'' x 13''
1 year, 2 months
Duckhams 75 Gallon Reef Thumbnail
darkwingduck Duckhams 75 Gallon Reef 75 Gallons
48'' x 20'' x 20''
3 years, 3 months
igorsreef Thumbnail
igorsreef igorsreef 50 Liters
45cm x 36cm x 31cm
8 years, 10 months
My Aquarium Thumbnail
cleanuup My Aquarium 90 Gallons
48'' x 18'' x 24''
7 years, 9 months
A Smart? Aquarium in Taiwan Thumbnail
shih87 A Smart? Aquarium in Taiwan 900 Liters
132cm x 90cm x 60cm
9 years, 11 months
IM Fusion 30L Thumbnail
rsaalman IM Fusion 30L 30 Gallons
36'' x 15'' x 13''
10 years, 3 months
Blue Lagoon Thumbnail
octopus Blue Lagoon 21 Gallons
40cm x 50cm x 40cm
4 years, 5 months
My Aquarium Thumbnail
billoord My Aquarium 50 Gallons
36'' x 16'' x 20''
2 years, 8 months
Flying Dutchman Thumbnail
parsec Flying Dutchman 300 Gallons
72'' x 35'' x 27''
8 years, 2 months
BIG REEF Thumbnail
darkwingduck BIG REEF 75 Gallons
48'' x 20'' x 20''
1 year, 25 days
My Reef Tank Thumbnail
far51 My Reef Tank 90 Gallons
48'' x 18'' x 24''
12 years, 4 months
Relic0407 30L Thumbnail
relic0407 Relic0407 30L 30 Gallons
36'' x 15'' x 15''
7 years, 4 months
30L Pico Thumbnail
dropped 30L Pico 30 Liters
1 year, 1 month
Hex's Reef Thumbnail
fishofhex Hex's Reef 145 Gallons
72'' x 18.5'' x 23''
1 year, 11 months
125 gal Thumbnail
luca1998 125 gal 124.7 Gallons
48'' x 30'' x 20''
11 years, 4 months
Cube 93g Thumbnail
aqua80 Cube 93g 93 Gallons
30'' x 30'' x 24''
14 years, 5 months
M's Tank of Acros Thumbnail
marcustan M's Tank of Acros 900 Liters
160cm x 80cm x 60cm
7 years, 9 months
Aquatop Thumbnail
apoythress Aquatop 24 Gallons
6 years, 7 months
90gal Basement Thumbnail
bmac96 90gal Basement 90 Gallons
48'' x 18'' x 24''
8 years, 5 months
525XL Thumbnail
ebeez 525XL 108 Gallons
60'' x 22'' x 22''
6 years, 6 months
29 Reef Thumbnail
jcpreef 29 Reef 29 Gallons
21'' x 20'' x 16''
7 years, 10 months
Big Island Thumbnail
bigisland Big Island 400 Liters
90cm x 70cm x 70cm
10 years, 7 months
Pete's Nano Tank Thumbnail
petes-aquarium Pete's Nano Tank 120 Liters
60cm x 45cm x 45cm
6 years, 8 months
Conix67's 75G Mixed Reef Thumbnail
conix67 Conix67's 75G Mixed Reef 75 Gallons
48'' x 18'' x 20''
15 years, 5 months
Black Pearl Thumbnail
carlonaz Black Pearl 40 Gallons
18.2'' x 36.3'' x 16.8''
1 year, 11 months
Elk Reef Thumbnail
tomek Elk Reef 300 Gallons
98'' x 30'' x 25''
10 years, 8 months
Devils Triangle Thumbnail
carlonaz Devils Triangle 75 Gallons
48'' x 18'' x 21''
1 year, 16 days
MyReef Thumbnail
luis4100 MyReef 135 Gallons
72'' x 24'' x 18''
12 years, 9 months
poposan's sps tank Thumbnail
poposan poposan's sps tank 1,162 Liters
175cm x 82cm x 81cm
12 years, 2 months
Aqua Base System 12 Thumbnail
cdaussht Aqua Base System 12 65 Gallons
11 years, 2 months
Dr Chris's 90 Thumbnail
danswaterworlds Dr Chris's 90 90 Gallons
10 years, 10 months
100G AI Thumbnail
crash2040 100G AI 100 Gallons
130cm x 50cm x 55cm
8 years, 9 months
My Aquarium Thumbnail
tdog My Aquarium 340 Gallons
78'' x 36'' x 28''
12 years, 5 months
Lipps Reef Thumbnail
lipps1971 Lipps Reef 160 Gallons
48'' x 18'' x 24''
11 years, 6 months
Soft Reef 001 Thumbnail
basile Soft Reef 001 150 Gallons
72'' x 24'' x 21''
10 years, 11 months
Sauerheber Reef Thumbnail
bsauerheber Sauerheber Reef 100 Gallons
47.5'' x 23.5'' x 20''
8 years, 4 months
Amanda's Tank Thumbnail
bsauerheber Amanda's Tank 40 Gallons
2'' x 1'' x 1''
8 years, 10 months
Fugs' Mini Reef 160 Thumbnail
fugly Fugs' Mini Reef 160 200 Liters
90cm x 45cm x 45cm
7 years, 7 months
Reefz Tank Thumbnail
chronzz Reefz Tank 120 Gallons
48'' x 24'' x 24''
4 years, 22 days
M's Anemone Tank - Finally!!! Thumbnail
marcustan M's Anemone Tank - Finally!!! 240 Liters
80cm x 60cm x 55cm
8 years, 7 months
Karl's RSM250 Thumbnail
karlyboy Karl's RSM250 250 Liters
96cm x 55cm x 66cm
11 years, 6 months
40 Breeder Reef Tank Thumbnail
codym808 40 Breeder Reef Tank 45 Gallons
36'' x 18'' x 16''
9 years, 12 days
Goldslinger cove Thumbnail
goldslinger Goldslinger cove 56 Gallons
30'' x 25'' x 18''
10 years, 6 months
Main Cube Thumbnail
jongalt26 Main Cube 93 Gallons
30'' x 30'' x 24''
9 years, 9 months
Nano Thumbnail
vinnie Nano 91 Liters
60cm x 40cm x 42cm
2 years, 10 months
Kisha 360L Thumbnail
pjvalencia Kisha 360L 360 Liters
120cm x 50cm x 50cm
1 year, 8 months