Dissolved gasses near disaster.

[duanes]

If draw a glass of water from the tap, and it is cloudy, and clears from the bottom up, It is saturated with gases.
When I worked for a water company, and we started using ozone as a primary disinfectant, we received many calls about cloudy water, because the water was a twice as saturated as before the use of ozone. Customers with fish started complaining about unusual deaths after water changes.
We believed after some investigation, the super saturation was the cause, and I started recommending the techniques I posted earlier in the thread, the calls stopped coming.

 

[duanes]

If you draw a glass of water from the tap, and it is cloudy, and clears from the bottom up, It is saturated with gases.
When I worked for a water company, and we started using ozone as a primary disinfectant, we received many calls about cloudy water, because the water was a twice as saturated as before the use of ozone. Customers with fish started complaining about unusual deaths after water changes.
We believed after some investigation, the super saturation was the cause, and I started recommending the techniques I posted earlier in the thread, the calls stopped coming.

 

[Randys]

Smaller water changes are definitely in my future. And now that I'm aware of the issue I can begin to experiment with fill methods to help "off gas" the fresh water.
Man, that was a scary deal.
FYI, surprisingly the Dolphin survived. I don't remember a time seeing a fish laying on the bottom on it's side and living. He's lucky too in another way. I don't know about other fish but I've learned that whenever Africans see weakness in another fish they go after them. This was already starting to happen but apparently he was still strong enough to hide in the rocks until feeling better. And now tonight he's eating again with everybody else.
Thanks for the help gang.

 

[RD.]

That makes sense Duane, no ozone here. I didn't realize that could cause such a problem. Good info.

 

[Randys]

Hey Duanes.
I just noticed your last post. That's interesting.
How effective would it be to use a typical hose sprayer?

I just tried filling a glass of cold water out of the tap also..........
The bubbles appear to be very minor.

 

[squint]

I had this problem when I started out. What I do now is fill a 55 gal plastic barrel with water and throw in as many as six heaters until it's heated to tank temperature. The nitrogen comes out of solution in the barrel instead of in the tank and thus no harm to the fish.

 

[duanes]

I think a sprayer would help, anything to cause agitation.
But if you fill a glass and its only slightly cloudy you may want to look at other possibilities, other than embolism.
In Milwaukee when I would fill an 8 oz glass, the water appeared milky white from the micro-bubbles, and took almost 1 minute to clear, from the bottom up.