WTB - Tunze ATO 3155 Osmolator

Apr 21, 2026

civber

Community Member

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Hi,
I’m looking to buy a Tunze Osmolator 3155 for my Innovative Marine 15 tank.
Preferably in good working condition, complete with all parts.

Located in California (CA)
Open to shipping or local pickup

Please let me know what you have available, condition, and price.
Thank you!

WHICH TYPE OF MISTAKE TAUGHT YOU YOUR MOST EXPENSIVE REEFKEEPING LESSON?

Moving too quickly or adding too much at once
Votes: 5 29.4%
Skipping—or shortening—quarantine or dipping
Votes: 4 23.5%
Buying the wrong equipment the first time
Votes: 4 23.5%
Ignoring maintenance, warning signs, or redundancy
Votes: 4 23.5%
Chasing numbers or making too many changes
Votes: 3 17.6%
Choosing incompatible fish, corals, or invertebrates
Votes: 2 11.8%
Poor aquascaping or tank-design decisions
Votes: 1 5.9%
Failing to research an animal’s needs
Votes: 1 5.9%
Trusting bad advice
Votes: 2 11.8%
Doing something on the tank when you should've gone to bed
Votes: 3 17.6%
Something else—tell us below
Votes: 3 17.6%
I’m still waiting for my first expensive lesson!
Votes: 2 11.8%

Tunze ATO 3155 Osmolator

civber

Community Member

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WHICH TYPE OF MISTAKE TAUGHT YOU YOUR MOST EXPENSIVE REEFKEEPING LESSON?

Moving too quickly or adding too much at once

Skipping—or shortening—quarantine or dipping

Buying the wrong equipment the first time

Ignoring maintenance, warning signs, or redundancy

Chasing numbers or making too many changes

Choosing incompatible fish, corals, or invertebrates

Poor aquascaping or tank-design decisions

Failing to research an animal’s needs

Trusting bad advice

Doing something on the tank when you should've gone to bed

Something else—tell us below

I’m still waiting for my first expensive lesson!

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