What’s this tank for?

[AlphaData]

Good day everyone

I bought a used reef tank that came with a sump pump, the sump is a three separate tanks and I know one is the main sump the other one is for ATO but I’m straggling to know what with the third one which I know most of you will know.

I included a picture.

Thanks

 

[fishface NJ]

The circle area looks like the skimmer area.

 

[AlphaData]

The circle area looks like the sump area.

It was in the sump it self with the previous owner.

I’m new to all of this it’s really overwhelming.

 

[BryanM]

From right to left, ATO, return chamber, and likely the returning water comes in on the left which would usually have filter socks.

 

[Fish Fan]

It was in the sump it self with the previous owner.

I'm not getting what we're looking at at all

This was inside the main sump? Could you provide a picture of the whole sump setup, with this part included?

 

[AlphaData]

I'm not getting what we're looking at at all

This was inside the main sump? Could you provide a picture of the whole sump setup, with this part included?

I'm not getting what we're looking at at all

This was inside the main sump? Could you provide a picture of the whole sump setup, with this part included?

This is a video from the previous owner unfortunately I don’t have he’s contact anymore.

 

[PharmrJohn]

I’m new to all of this it’s really overwhelming.

It is. When I first got into this I did it blindly, knowing VERY little about the how's and the why's. If you are in the same situation I was, I would suggest you put a pin in the project and educate yourself before moving forward. After a 13 year break, I did just that. I've been studying off and on for the last few years. Now, my wait has been due to not being able to set up physically in my living room. But I've used that time to re-acquaint myself with all the info I need to be successful. Anyway, just a thought.........