Are Large Water Changes Killing Fish? Small vs Large Water Changes -

  • We are currently upgrading MFK. thanks! -neo
I live in the tropical country. And i am using well water
 
giar said:
6.4 right out from tap. 7 when stable
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I'd think it would settle a little higher than 7, but even 6.4 to 7.4 would only be around 30 ppm and that wouldn't be enough to cause a problem. I don't think you'll have any problem filling up the tank at a faster rate. You could gradually increase the flowarate as you feel comfortable.

In order to aerate the water when filling up the tank, I would turn the valve partially-closed at the end of the hose (tank end) so the water spreads out like from a garden hose and hits the edges of the waterline hard creating a lot of turbulence.

giar said:
I was under the impresion that my tap contains so little to no oxygen.
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Fish can tolerate higher CO2 levels as long as O2 isn't depleted so the two are related. Aerating the water will decrease CO2 and increase O2 if it's low so I don't think there will be a problem.
 
Sorry the ph settle after 24 hours would be 7.2 not 7.

I place the hose to my top filter while fillin the water so the water falls from the output.

I tried to fill the water faster and the fish seemed to get stressed out a bit. The rays was breathin a bit faster than they normally do, but then it settled out after 24 hours more or less
 
Well yesterday i did like 60% wc and thats what i normally do for the weekly wc. But the diff is the rate i filled the water.

Perhaps next time i will try to do less % but with faster rate and see how they react?
 
I wish I knew more about rays ... I've seen CO2 poisoning in small fish before so I know what it looks like with them but not with larger fish or rays especially. When I first got a CO2 canister for my planted tank I turned it on for a couple minutes and tried to locate a small leak. When I looked up two of the fish were darting, one was swimming upside down, I believe one was swimming sideways .. it was crazy. They quickly began acting drunk and started passing out. I only managed to get one out and figured the rest were dead. But most of them came around within an hour or so. I had added a powerhead with a venturi which must have made a big difference.

Now that I think of it, maybe you should try a powerhead and use the venturi to aerate the water while filling the tank.
 
Yea my aro didnt bother at all just the rays acted a bit unusual.. hahah
 
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