Pond Boss Magazine
https://www.pondboss.com/images/userfiles/image/20130301193901_6_150by50orangewhyshouldsubscribejpeg.jpg
Advertisment
Newest Members
Shotgun01, Dan H, Stipker, LunkerHunt23, Jeanjules
18,451 Registered Users
Forum Statistics
Forums36
Topics40,899
Posts557,051
Members18,451
Most Online3,612
Jan 10th, 2023
Top Posters
esshup 28,407
ewest 21,474
Cecil Baird1 20,043
Bill Cody 15,110
Who's Online Now
6 members (catscratch, Brandon Larson, Layne, Dave Davidson1, Blestfarmpond, Angler8689), 638 guests, and 166 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Joined: Dec 2015
Posts: 16
B
OP Offline
B
Joined: Dec 2015
Posts: 16
I have a pond thats nearly a little over an acre. The average deph is 10' with the deepest being 13ft. It is Spring fed from 3 diff locations and the pond holds 1,200,000 gallons. I have about 110 rainbow trout stocked in this pond. Here is the problem.

I have 2 kasco aerators running 24 hours now as i did the gradual startup even though its a new pond just to be safe. Initially the diffusers were at the deepest point 13ft and 10ft.
SOMEHOW they have moved to 12' and 6'.

Anyways i took the surface temp today and it read 80 deg. I put an orvis thermometer on a line and cast it into the deepest part and when i retrieved it after 10 minutes it read 78 degrees cry then i put a float on the line and cast it out at the 8ft mark and read the same. I did have one floater last week and one this week. If those temps are correct how are these trout even living or is my thermometer messed up? I guess what i need to ask is am i running the aerators to much that its mixing to much warm surface water? Should i just aerate at night? And also should i put the aerators back to their original positions at 13' and 10' ? At this point i fully expect to loose all these trout Any help would be greatly appreciated

Last edited by Bob-in-PA; 06/28/16 03:10 PM.
Joined: May 2002
Posts: 1,654
Likes: 1
B
Ambassador
Hall of Fame 2014
Lunker
Offline
Ambassador
Hall of Fame 2014
Lunker
B
Joined: May 2002
Posts: 1,654
Likes: 1
How old is this pond? New ponds generally don't need aeration, and it is likely that moving all of that water around has made the pond relatively uniform in temperature and at the temps you posted I agree that the trout won't likely live long. BTW, I am no expert, and hope the real ones chime in soon.


"I love living. I have some problems with my life, but living is the best thing they've come up with so far." � Neil Simon,
Joined: May 2002
Posts: 1,654
Likes: 1
B
Ambassador
Hall of Fame 2014
Lunker
Offline
Ambassador
Hall of Fame 2014
Lunker
B
Joined: May 2002
Posts: 1,654
Likes: 1
I did see that you say it is a new pond.


"I love living. I have some problems with my life, but living is the best thing they've come up with so far." � Neil Simon,
Joined: Dec 2015
Posts: 16
B
OP Offline
B
Joined: Dec 2015
Posts: 16
Yes about 9 months old, i dont know if i should shut the system down now and try to get the bottom cooler or not ?

Joined: Jun 2007
Posts: 7,099
Likes: 22
R
Ambassador
Field Correspondent
Hall of Fame
Lunker
Offline
Ambassador
Field Correspondent
Hall of Fame
Lunker
R
Joined: Jun 2007
Posts: 7,099
Likes: 22
I'd shut the system down for at least 4 days, and then run the aeration from the deepest points for 4 hours from about 4am to 8 am for a week, then check temps. If you have or want to spend the $$$ on an O2 meter, knowing your dissolved oxygen at the deepest would be very useful info!

My guess is that your water quality is really good, and there is plenty of dissolved oxygen if your water temps are that high or your Rainbows wouldn't be alive. 70* is considered the deadly high temp zone, but in good conditions, they can survive in 80* temps, but not for very long.

What is the temp and flow from the feeder springs? The trout probably hang out close to those if there is significant flow and lower temps....

Last edited by Rainman; 06/28/16 06:53 PM.


Joined: Apr 2002
Posts: 15,110
Likes: 476
B
Moderator
Ambassador
Field Correspondent
Lunker
Offline
Moderator
Ambassador
Field Correspondent
Lunker
B
Joined: Apr 2002
Posts: 15,110
Likes: 476
Are you seeing the rainbows? Are they feeding? Did you take the temperatures where the springs are flowing into the pond? If the springs are not inflowing a significant amount of water and if you are not seeing the trout they could be dead lying on the bottom.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management
Joined: Dec 2015
Posts: 16
B
OP Offline
B
Joined: Dec 2015
Posts: 16
They were feeding last night although i didnt feed much in these conditions, the one spring the overflow from our springhouse enters at 57 degrees but it only provides 2 gallons a minute, Didnt check the other spots, i fear that what you say may be true Bill. So at this point should i just let it run??? i seen one or two near the surface so who knows

Joined: Dec 2015
Posts: 16
B
OP Offline
B
Joined: Dec 2015
Posts: 16
Rainman wont shutting this down for that amount of time hurt the o2 levels to lethal if it hasnt already happened???

Joined: Jun 2007
Posts: 7,099
Likes: 22
R
Ambassador
Field Correspondent
Hall of Fame
Lunker
Offline
Ambassador
Field Correspondent
Hall of Fame
Lunker
R
Joined: Jun 2007
Posts: 7,099
Likes: 22
Bob, what else is there, aside from the 100 trout? Being a new pond, and considering the large volume of water, low amount of detritus, oxygen consumption, and DO reduction, should be minimal.



Joined: Jan 2009
Posts: 28,407
Likes: 788
Moderator
Ambassador
Field Correspondent
Lunker
Offline
Moderator
Ambassador
Field Correspondent
Lunker
Joined: Jan 2009
Posts: 28,407
Likes: 788
I've had trout alive in a clients pond with 78 degree water temps. 3 bottom diffusers and a large surface agitator had O2 levels at saturation.

I've had trout in my pond die at mid 70 degree water temps.

My pond is 18' deep.

One year I bought a low temp t-stat and only ran the bottom diffusion aeration system when ambient temps were below 70°F at night. Didn't do a durn thing, in fact the trout died even quicker because the pond was within a few degrees water temp too to bottom, and the O2 levels weren't high enough for the trout. In other words, aerating only at night did nothing.

Next year I didn't aerate at all, and the pond set up a thermocline. The trout lived a month longer than the previous year, but they still all died around July 4th.

I would move the diffusers to 1/2 the max depth of the pond, and run them 24/7 and hope that you keep your O2 levels up enough for the trout to survive.

Now I look at trout as October thru mid June fish.


www.hoosierpondpros.com


http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).
Joined: Dec 2015
Posts: 16
B
OP Offline
B
Joined: Dec 2015
Posts: 16
The trout are the only thing we have in the pond.

Joined: Dec 2015
Posts: 16
B
OP Offline
B
Joined: Dec 2015
Posts: 16
Wow interesting post esshup, i have read countless post in the archives about direct o2 and water temp, trying to find the perfect balance etc etc and what i come to learn is that sometimes for as much as we know we know nothing.

Joined: Jan 2009
Posts: 28,407
Likes: 788
Moderator
Ambassador
Field Correspondent
Lunker
Offline
Moderator
Ambassador
Field Correspondent
Lunker
Joined: Jan 2009
Posts: 28,407
Likes: 788
Originally Posted By: Bob-in-PA
Wow interesting post esshup, i have read countless post in the archives about direct o2 and water temp, trying to find the perfect balance etc etc and what i come to learn is that sometimes for as much as we know we know nothing.


The O2 mortality threshold for trout is 5 mg/L.


www.hoosierpondpros.com


http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).
Joined: Mar 2014
Posts: 227
T
Offline
T
Joined: Mar 2014
Posts: 227
Are you sure you are correct on your math for the gallons of water? Im getting 2.5 -3 million gallons with 27k gallons per inch.

Joined: Jan 2009
Posts: 28,407
Likes: 788
Moderator
Ambassador
Field Correspondent
Lunker
Offline
Moderator
Ambassador
Field Correspondent
Lunker
Joined: Jan 2009
Posts: 28,407
Likes: 788
Originally Posted By: ToddM
Are you sure you are correct on your math for the gallons of water? Im getting 2.5 -3 million gallons with 27k gallons per inch.


Good point, I saw the numbers but didn't pay much attention to them.

One acre foot of water is 325,851 gallons. If the pond is one surface acre, and it averages 10' deep, then it's over 3 million gallons.


www.hoosierpondpros.com


http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).
Joined: Jun 2012
Posts: 2,058
Likes: 7
D
Offline
D
Joined: Jun 2012
Posts: 2,058
Likes: 7
I was told last year to look at my rocks and see if there is bubbles forming on their surface. There was all kinds and 24/7 aeration was way to much.

Running the aeration 24/7 in the summer warm saturated the pond more than just running it at night. I now run the air from 1am to 7am only when it is cooler. It has kept our pond cooler over all and the pond is new as well. We only have perch in our pond.

It is neat swimming. The top 4 feet is warm but your toes are about 10 degrees cooler.

Cheers Don.


[Linked Image from corvettejunkie.com]
http://www.pondboss.com/subscribe.asp?c=4


7/8th of an acre, Perch only pond, Ontario, Canada.
Joined: Aug 2013
Posts: 249
H
Offline
H
Joined: Aug 2013
Posts: 249
My brook trout pond usually stops going out the overflow and begins to drop around August/September for a while then flows again. It's been so dry here it's already down a foot. I have a spring with good cold flow about 1,500 feet away. I'm running 1" line from it to the Brookie pond. Will check the temp at the source and the temp coming out at the pond. I will run the line mostly through heavily shaded woods but I still expect a rise in temp. If it's excessive I plan to get the backhoe out and dig a couple deep holes in a mostly eastward facing low spot uphill from the ponds and loop a few hundred feet of line and bury it in the hole before continuing the run to the pond. This should cool the water sufficiently prior to allowing it to fall about three feet as it enters the pond to help with oxygen. The vertical drop from the spring source to the pond I estimate to be about seventy feet, perhaps a bit more. This pond is quite small, about 1/10th acre. Not sure if you have a layout that might allow you to try something similar but thought I would put this here for consideration. I plan to have this in place over the next couple days. Ran 600 feet after work this evening.

Last edited by Hollywood; 06/29/16 09:12 PM.

Pond Boss subscriber

Would those that say "it can't be done" please refrain from interrupting those that are doing it...

Link Copied to Clipboard
Today's Birthdays
Bob Lusk, GaryK, GrizzFan, PhotographerDave
Recent Posts
Happy Birthday Bob Lusk!!
by Rainman - 03/28/24 02:53 AM
Relative weight charts in Excel ? Calculations?
by Mark Dyer - 03/27/24 10:18 PM
Reducing fish biomass
by esshup - 03/27/24 06:17 PM
New 2 acre pond stocking plan
by esshup - 03/27/24 06:05 PM
1 year after stocking question
by esshup - 03/27/24 06:02 PM
Questions and Feedback on SMB
by Donatello - 03/27/24 03:10 PM
Paper-shell crayfish and Japanese snails
by Bill Cody - 03/27/24 10:18 AM
Brooder Shiners and Fry, What to do??
by esshup - 03/27/24 08:47 AM
2024 North Texas Optimal BG food Group Buy
by Dave Davidson1 - 03/27/24 08:15 AM
Dewatering bags seeded to form berms?
by esshup - 03/26/24 10:00 PM
Freeze Danger? - Electric Diaphragm Pump
by esshup - 03/26/24 09:47 PM
Newly Uploaded Images
Eagles Over The Pond Yesterday
Eagles Over The Pond Yesterday
by Tbar, December 10
Deer at Theo's 2023
Deer at Theo's 2023
by Theo Gallus, November 13
Minnow identification
Minnow identification
by Mike Troyer, October 6
Sharing the Food
Sharing the Food
by FishinRod, September 9
Nice BGxRES
Nice BGxRES
by Theo Gallus, July 28
Snake Identification
Snake Identification
by Rangersedge, July 12

� 2014 POND BOSS INC. all rights reserved USA and Worldwide

Powered by UBB.threads™ PHP Forum Software 7.7.5