Introduction: The Frustration of Fishing in Fat Water Rivers
Let me start by saying—fishing in a fat water river can be a real headache! You see all those fish bubbles (fish stars) popping up, but the fish just won’t bite. I recently got a question from a fellow angler about a moat near their place: 1.5 meters deep, super fat water, lots of aquatic plants, crucian carp weighing 2-5 liang (around 100-250g), some carp up to 2 jin (1kg), and way too many small white fish (bait stealers!). They used 1.2 main line with 0.6 sub line, but the bites were terrible. Even though the position seemed good, the fish just weren’t interested in the bait. Sound familiar? Let’s dive into how to fix this!
Why Your Bites Are Missing: Common Issues in Fat Water Rivers
Fat water rivers (like moats) are tricky because they’re usually stagnant, full of nutrients, and have thick mud or garbage at the bottom. Here are the main reasons you’re not catching fish:
- Low oxygen levels: Fat water holds less oxygen, so fish are lazy.
- Thick mud/silt layer: Bait might sink into the mud, so fish can’t find it.
- Wrong bait: Too strong or wrong flavor turns fish off.
- Timing: Wrong time of day or weather.
Step 1: Choose the Right Position and Weather
Weather First—Oxygen Is Key!
Fish in fat water need oxygen to be active. So forget those calm, sunny days—they’re a waste! Instead:
- Rainy days: Rain adds oxygen to the water. Fish go crazy for food then!
- Windy days: Head to the downwind side. The wind pushes oxygen and food there—fish love it!
- Early morning/late evening: In early autumn, these times have perfect water temps. Try 5-8 AM or 5-7 PM.
Position Tips: Avoid the Mud and Find Oxygen
Moats often have thick mud or garbage. If you see fish stars but no bites, your bait might be stuck in the mud. Try these spots:
- Next to aquatic plants: Crucian carp hide here, but don’t cast directly into thick plants—use gaps.
- Downwind edges: As mentioned, oxygen and food gather here.
- Shallow areas (1-1.2m): If the main river is 1.5m, try shallower spots near the bank—fish might be there for food.
Step 2: Fix Your Bait—Less Is More!
Flavor: Ditch the Strong Stuff
In early autumn, crucian carp don’t need super fishy bait. Fat water already has lots of food, so strong flavors can repel them. Try:
- Milk flavor + tiny bit of protein: Mix milk-flavored bait with a pinch of shrimp powder or fish bone meal. Just a pinch—too much is bad!
- Light sweet/natural flavor: If milk doesn’t work, switch to light sweet (like corn) or natural (wheat) bait. Fish get tired of strong flavors quickly.
- Add a little attractant: A drop of fruit or sweet attractant can help, but don’t overdo it. Less is more!
Texture: Light and Floating
Fat water has thick mud. If your bait sinks into it, fish can’t see it. So:
- Use floating bait: Or make your bait lighter by adding some floating powder.
- Lift your hook: After finding the bottom, adjust your float to lift the hook 10cm off the mud. This way, the bait is above the mud.
- Smaller hooks: Use size 3-4 hooks. Big hooks scare small crucian carp.
Step 3: Adjust Your Technique—Be Patient!
Line Group: Your Line Is Probably Fine
The angler used 1.2 main + 0.6 sub line—this is good for crucian carp up to 5 liang. If you’re missing bites, it’s not the line. Try:
- Smaller float: A smaller float is more sensitive. You’ll see tiny bites better.
- Light sinker: Let the bait fall slowly. Fish have more time to see it.
Timing and Patience: Keep Trying!
If you still don’t get bites:
- Change positions: If one spot doesn’t work after 30 minutes, move to another. Fish move around a lot.
- Try different depths: Fish might be in the middle water. Adjust your float to fish 50cm or 1m deep.
- Be patient: Fat water fishing takes time. Don’t give up after 10 minutes!
Final Tips from My Experience
I once fished in a fat water moat like this. I tried everything—strong bait, deep fishing, etc.—but nothing worked. Then I switched to milk-flavored bait, lifted the hook 10cm, and fished at dawn. I caught 5 crucian carp in 2 hours! So remember:
- Weather > position > bait > technique.
- Less flavor, lighter bait, and patience are key.
Hope this helps! Let me know if you catch any big ones—share your stories below!

