Recognizing Thermocline

do you actually see it on the screen or simply the absence of life below a certain point ?

I see it on my screen (HDS Gen 3), and usually no fish below it. Screen looks almost "fogged" from where it starts on down. But the missing fish below are the give-away to it.

I have a gen 1 Helix-9 . Not sure how to set to better see it .

Turn your sensitivity all the way up or nearly all the way on your 2d sonar and you should see it appear very easily


Sent from my iPhone using Tapatalk

Quote:

---

Originally Posted by eagle 1

do you actually see it on the screen or simply the absence of life below a certain point ?

---

I usually see it on the screen as a "fuzzy" line that stays at the same depth.

Not all lakes develop a thermocline !!

Quote:

---

Originally Posted by RK1

Turn your sensitivity all the way up or nearly all the way on your 2d sonar and you should see it appear very easily


Sent from my iPhone using Tapatalk

---

I sure wouldn't.

Turn SwitchFire to Max mode and you'll have to back it DOWN it's so hot....

I turn up my gain/sensitivity to find it. The big 4 is running around 15' fish where the water depth goes from 15 to deeper water, The magic depth yesterday was 21'.

Quote:

---

Originally Posted by trypman1

I turn up my gain/sensitivity to find it. The big 4 is running around 15' fish where the water depth goes from 15 to deeper water, The magic depth yesterday was 21'.

---

Wait .... WHAT ??? :scratchhead You're supposed to fish ABOVE the thermocline, so if the thermocline is at 15', then why is the magic depth SIX FEET BELOW that ?? :dono :confused: :help

Quote:

---

Originally Posted by CrappiePappy

Wait .... WHAT ??? :scratchhead You're supposed to fish ABOVE the thermocline, so if the thermocline is at 15', then why is the magic depth SIX FEET BELOW that ?? :dono :confused: :help

---

Because crappie like to have a certain amount of water under them too?

Here's a screenshot from Saturday at Back River. Gain on my Garmin was cranked up pretty high.
Attachment 311696

We have average of 8' thermocline on the shallow lake I fish most . Looks like your question was answered. In summer low oxygen means few if any fish below the thermocline .I see guys set trotline then act shocked when the fish all dead . They anchor them down and fish can't move into good water. I have no trouble seeing it on my Humminbirds . It appears as a cloudy area from bottom up to the thermocline on my screen .

Quote:

---

Originally Posted by eagle 1

do you actually see it on the screen or simply the absence of life below a certain point ?

---

Fishing on PP Saturday evening. Down-imaging on Garmin, appeared to be a distinct line around 30 feet (40-60 feet deep). Possibly viewing the thermocline?

Hope this isn’t a dumb question from grad of the school near Sardis.. Haha





Sent from my iPhone using Crappie.com Fishing mobile app

Quote:

---

Originally Posted by TNReb58

Fishing on PP Saturday evening. Down-imaging on Garmin, appeared to be a distinct line around 30 feet (40-60 feet deep). Possibly viewing the thermocline?

Hope this isn’t a dumb question from grad of the school near Sardis.. Haha

---

That's what it sounds like. It's a lot easier to see if you turn up the brightness(gain). On my previous screenshot my brightness was turned up past 90.

thermocline at 40 fow. Notice the fish below it coming off a slope. Finding a sharp depth change intercepting the thermocline can be great fishing. It is not too common to see this many fish that far below the thermocline. this was Stripers mixed with sand bass


Attachment 312660

Thermocline showing at ~28ft on my 7SV. It's still visible on medium gain but much more prominent on auto high.

Attachment 313099

Distinct line on screen

Thanks!