Fly Bags - How To Use

Want To Know How To Use Grandpa Gus's Fly Catching Bags? See These Links...


How To Use Grandpa Gus's Fly Bags - Product Use:

1) Unscrew top knob on bag

2) Fill bag with water up to fill line

3) Hang in a sunny area where flies are present.



Frequently Asked Questions (FAQs)

How Does This Product Work:
The water you pour into the bag reacts with the bait in the bag. The bait is made from fish bone meal. As the sun hits the bag, the fish begins to smell and this attracts the flies.
Gus likes to keep things simply (and bit smelly).


Can I use these in my barn?

Yes, the bait is just fish bone meal, i.e. dried fish leftovers.

Many customers use these in their barn.


What happens if the products touches my hands, shoes, etc?

Your hands will smell. Gus recommends washing them if they smell.


Can I breathe in the smell?

Yes, but you probably won't like it!


How long does the product last?

Weeks and weeks, either until the bag fills up with thousands of flies or until the water evaporates.



Can I add more water if it evaporates?

Yes, just ensure the bait is still smelly after adding new water.


What do I do once the bag is filled?

Screw the cap down again and dispose of the bag.


Will this bag catch bees?

Very, very likely not. Bees do not favor the bait and would not be attracted to the color of the entry. 
While some flying insect products are harmful to bees, Gus has designed this one to be in the "not harmful" category. You should not fear harming bees by using this product.

What are the ingredients?

Fish bone meal. That's it.


Can I re-use the bags? Can I buy replacement bait?

No. Once the bag is full of flies it is meant to be thrown out. It is disposable so it is easy to dispose of the dead flies.


Where To Use:

The bags will work nearly anywhere that there is sunlight, i.e. the ability to warm the bait/water mix, so the smell is released.

See the image below for where to hang your bags.


How can I contact you?


Chat: (see the little lightning bolt at the bottom of the screen... Click on it to chat over Facebook)



Can I talk to somebody on the phone?

Unfortunately not. Here's the thing... when we go on air we get hundreds of calls and have no way to answer them. We can, however, help you much more quickly other ways...

Send us and email at or click the lightning bolt at bottom of this screen to chat with somebody over Facebook.

We can answer email lightning quick but we are super-duper slow answering the phone. Sorry.


Text Your Question To A Real Live Person

You can talk to a real live person (no kidding!) over chat, Tuesday to Saturday, 11 a.m. - 7 p.m. CST.

At the bottom of your screen you will see a blue lightning bolt inside of a circle. Click that lightning bolt and you'll be taken to our Facebook chat. There you'll be able to talk to a live chat agent and get your questions answered.

If you contact us after chat hours, your message will forwarded and we'll respond back to you the next day.


Contact Info 

For support, contact us by:


Chat: (see the little lightning bolt at the bottom of the screen... Click on it to chat over Facebook)