Fish dying as water is turning colder


mrsclem

mrsclem
Joined
Jul 21, 2008
Messages
3,230
Reaction score
2,811
Location
st. mary's county, md.
Hardiness Zone
7A
Country
United States
Totally disagree with opinion on Melafix. Just my opinion but several years ago I had a water quality issue with one of my ponds that resulted in sever bacterial infections and fin rot with my koi. Used Melafix and followed up with Pimafix and while I did lose some koi, most totally recovered.
 
Ad

Advertisements

Joined
Oct 4, 2019
Messages
59
Reaction score
30
Location
Winchester, VA
Hardiness Zone
6b
Country
United States
Do you have a sinking thermometer so you can see what the water temperature is at depth? I suspect it is warmer 6 feet down than a reading from a floating thermometer.

I still don't think this is a temperature problem. With the water at 43 degrees, the fish should be fine.
 
Joined
Oct 4, 2019
Messages
59
Reaction score
30
Location
Winchester, VA
Hardiness Zone
6b
Country
United States
  • Like
Reactions: JRS

mrsclem

mrsclem
Joined
Jul 21, 2008
Messages
3,230
Reaction score
2,811
Location
st. mary's county, md.
Hardiness Zone
7A
Country
United States
We had a holding tank that was part of the pond that had gone stagnant and was full of rotted leaves. That caused our problem. When we found the first few dead koi we started to drain the pond and found a lot more so yes, we did a water change. Study was done on goldfish and clownfish. Doesn't say what problems were treated. I had severe fin rot on all but 2 koi, several that had tails that were completely gone. 3 weeks of treatment, 90% of koi survived and even regrew fins and tails. I keep both meds stocked now.
 
Joined
Oct 4, 2019
Messages
59
Reaction score
30
Location
Winchester, VA
Hardiness Zone
6b
Country
United States
I'm glad you were able to save the fish, but I would suspect that it was because you corrected the water problems and gave them an environment to live in that they could heal themselves. I'm sure that's not what you believe, and I'm glad it worked out for you. But personally, I doubt it was the Melafix, just good water.

My motto is always fix the water first. Most problems can be cured with good, healthy water. And no medication will work if the water is still polluted.

Just my 2 cents worth.
 
Joined
Nov 19, 2019
Messages
26
Reaction score
7
Location
Ohio
Hardiness Zone
6
Country
United States
Ad

Advertisements

Joined
Oct 28, 2013
Messages
8,671
Reaction score
9,312
Location
Northern IL
Melafix does nothing
I read the link you posted - I don't think it's accurate to say it "does nothing". What I read was that it does not change the water parameters (which would be a good thing) and it did not appear that the results user report were due to antibacterial properties. "This topic will require further research and possibly an in vivo study." I read that as "people report that it works; we just don't know why".
 
Joined
Oct 4, 2019
Messages
59
Reaction score
30
Location
Winchester, VA
Hardiness Zone
6b
Country
United States
Maybe that wasn't a good way to put it. But it had no effects on the pathogens they tested it against and they stated that it had no antibacterial properties. Don't most people use it to treat bacterial infections? To me that sounds like it doesn't work for what most people use it for.

People often think that things work that really don't, when it is something else they have done that really cures the problem. Think in terms of placebos.
 
Joined
Nov 19, 2019
Messages
26
Reaction score
7
Location
Ohio
Hardiness Zone
6
Country
United States
Do you have any idea how much baking soda to add for 8000 gallons of water?
 
Joined
Apr 2, 2019
Messages
105
Reaction score
170
Location
Purlear, NC
Hardiness Zone
7a
Country
United States
Do you have any idea how much baking soda to add for 8000 gallons of water?
What I've always used was 1 cup per 1000 gallons (so 8 cups in your case) Mix in a bucket full of pond water to dissolve, then pour it in. Wait 24 hours, retest kh levels, and repeat once a day until levels are where you want them.
 
Ad

Advertisements

Joined
Oct 4, 2019
Messages
59
Reaction score
30
Location
Winchester, VA
Hardiness Zone
6b
Country
United States
To raise the KH 1 drop (17.86ppm) in 8000 gallons you would need 1.67 pounds of baking soda.

So it would depend on how much you want to raise the KH level.

It would be good to go slowly and not dump it all in at once, since it will raise the pH as well. You don't want a big jump there.

When the pH gets to around 8 you can add as much as you need to get the KH where you want it to be, and the pH won't go up significantly at that point, only to 8.2 or 8.3. And yes, mix it with water before putting it in your pond.
 
Joined
Nov 19, 2019
Messages
26
Reaction score
7
Location
Ohio
Hardiness Zone
6
Country
United States
What I've always used was 1 cup per 1000 gallons (so 8 cups in your case) Mix in a bucket full of pond water to dissolve, then pour it in. Wait 24 hours, retest kh levels, and repeat once a day until levels are where you want them.
Thank you
 
Joined
Nov 19, 2019
Messages
26
Reaction score
7
Location
Ohio
Hardiness Zone
6
Country
United States
To raise the KH 1 drop (17.86ppm) in 8000 gallons you would need 1.67 pounds of baking soda.

So it would depend on how much you want to raise the KH level.

It would be good to go slowly and not dump it all in at once, since it will raise the pH as well. You don't want a big jump there.

When the pH gets to around 8 you can add as much as you need to get the KH where you want it to be, and the pH won't go up significantly at that point, only to 8.2 or 8.3. And yes, mix it with water before putting it in your pond.
Thank you.
 
Joined
Oct 4, 2019
Messages
59
Reaction score
30
Location
Winchester, VA
Hardiness Zone
6b
Country
United States
That would be fine. I have a closed pressure system and my filter works best with that level of KH. Anywhere between 150 and 200 would be good. But even higher isn't a problem. It's very forgiving, so it's not so critical to have an exact number.
 
Ad

Advertisements

sissy

sissy
Joined
Jan 17, 2011
Messages
31,903
Reaction score
14,818
Location
Axton virginia
Hardiness Zone
7A
Country
United States
Is this a natural pond that has slopping sides as chemicals can travel by air and by run off .Do you have an aerator .What is the pond bottom like .I put a hose on the bottom of my pond that pumps water up from the very bottom of the pond .But Ohio is much colder than I am .Do you take the temperature of the pond water at the deepest and the shallow parts .
 
Joined
Sep 14, 2013
Messages
4,637
Reaction score
3,582
Location
Cincinnati, Ohio
Hardiness Zone
6 A
Country
United States
I'm glad you've ordered the baking soda. If you live near a Sam's Club or Costco, you can buy it enlarge quantities there as well.

I'm very sorry for the loss of your fish, do you have a plan to retrieve their dead bodies, so they don't decompose in your pond water?
 
Joined
Nov 19, 2019
Messages
26
Reaction score
7
Location
Ohio
Hardiness Zone
6
Country
United States
I'm glad you've ordered the baking soda. If you live near a Sam's Club or Costco, you can buy it enlarge quantities there as well.

I'm very sorry for the loss of your fish, do you have a plan to retrieve their dead bodies, so they don't decompose in your pond water?
I have taken the dead fish out, at least the ones I can see. Added my first dose of baking soda today.
 
Ad

Advertisements

Joined
Nov 19, 2019
Messages
26
Reaction score
7
Location
Ohio
Hardiness Zone
6
Country
United States
That would be fine. I have a closed pressure system and my filter works best with that level of KH. Anywhere between 150 and 200 would be good. But even higher isn't a problem. It's very forgiving, so it's not so critical to have an exact number.
Added my first dose of baking soda this morning.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top