I am stumped

[Robb1414]

75 gallon long. Established December 2018. Yellow Tang, One Spot Fox Face, two clowns, two small file fish and a firefish. The last three days everybody seems super lethargic. Water perimeters are perfect. Checked temp and all good. No new inhabitants in six weeks. I QT everything. This is a fish only tank. I can't figure it out. Oxygen isn't an issue I have plenty of water movement and also an airstone on at all time. The fish have zero signs of disease and are eating. They just aren't swimming much. It's very odd. Any suggestions? Nobody is near returns either. They kind of just bob around the tank. Spend more time on bottom.
What am I missing??

 

[JoshKReef]

Did you turn your house heater on recently?

Just because you have water movement and an air stone doesn't matter if you have high CO2 levels in house (unless you draw outside air for the air stone / your skimmer).

 

[Robb1414]

Yes actually we did. So what do I do??

 

[JoshKReef]

You didn't answer if you turned your home heater on recently.

What area of the country (if in US) or world do you live?

 

[Robb1414]

We did. I am in Long Island, NY. House temp doesn't go above 72.

 

[JoshKReef]

Do you run a protein skimmer? Is your house near an outside wall or window?

I imagine its cold outside since you turned the heater on.

The easiest way to test if oxygen is the issue would be opening a window near the tank, or get some fresh air near it.

Alternatives would be sitting whatever you use to power your air stone outside a window and powering the air stone with outside air.

Feed your skimmer fresh air from outside

Hook up a CO2 scrubber to your skimmer.

In the short term, if possible I would do the air stone method (since you use one already). Set your airstone outside a window, and run a tube to your tank to power the airstone.

 

[Robb1414]

Do you run a protein skimmer? Is your house near an outside wall or window?

I imagine its cold outside since you turned the heater on.

The easiest way to test if oxygen is the issue would be opening a window near the tank, or get some fresh air near it.

Alternatives would be sitting whatever you use to power your air stone outside a window and powering the air stone with outside air.

Feed your skimmer fresh air from outside

Hook up a CO2 scrubber to your skimmer.

In the short term, if possible I would do the air stone method (since you use one already). Set your airstone outside a window, and run a tube to your tank to power the airstone.

Thank you - I have all the windows open now. I need to get tubing bc the tank is no where near a window.

 

[JoshKReef]

Use the biggest tube possible, and reduce it as close to the airstone / skimmer as possible.

What I said above only matters if you are naturally drawing air from the outside, if you are pumping it it doesn't matter.

 

[Robb1414]

I really will be crushed if I lose these fish. I have tried to do everything right.

 

[JoshKReef]

I edited the above post, just in case you didn't see that.

 

[moz71]

Did anyone spray any cleaner or aresol near tank and in room? Not sure if some chemical got in that way

 

[Robb1414]

Did anyone spray any cleaner or aresol near tank and in room? Not sure if some chemical got in that way

Not that I know of....they seem to be a little better. I really got the water moving. I am still stumped!

 

[BayouReefer]

Just a suggestion you said you have an air stone and water moving but is at least one of your circulation pumps pointed at the surface? If not point one up at the surface to break surface tension this will help more than an air stone.