So, I am a die hard Pyranha fan (minus the price). I prefer the water-based blue bottle as we’ve had many bad reactions to the oil-based. Anywhoo, I came across another version of a water-based spray at 1/3 of the price called Pyranha Nulli Fly Spray (black bottle). Does it compare at all to the blue bottle? Trying to save a buck without wasting my money. Looking for reviews and comparisons.
Have you looked at the active ingredients?
The black bottle contains 0.075% pyrethrins and 0.15% permethrin.
The blue bottle contains 0.25% pyrethrins, 2.5% piperonyl butoxide, and 0.50% permethrin.
That’s a pretty significant difference!
I miss the blue bottle… no one stocks it anymore near me and I hate having to order fly spray online. Someone on COTH said the blue bottle was now in a yellow bottle, too, carrying a water-based label. But I have yet to see that in person or in pictures.
Also a Pyranha fan. Years ago I did all the math with ingredients and percentages figured out that I could dilute one of their concentrates to get close to one of the expensive small bottles.
YMMV, and read all the warnings and such… off-label use is Not Allowed of course. 
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We banned all Pyranha products when we had one horse very sensitive to them.
What works good for us is Farnam Tritek on oily and Equitek in water soluble.
Tritek is considerably longer lasting, but leaves horses oily and dust sticks to them.
Equitek has to be applied more often and leaves horses clean.
Using fly predators has worked very well for us, but a few flies still bug horses and they don’t like ANY of those.
If using fly predators, be careful not to get fly spray of any kind on any other than the horse, like bedding or manure, or it will thin them out along with the flies.
Unsure about the Nulli, but I like the water-based (blue bottle). I did just order a quart spray of the green bottle “natural” version to see how that works. Reviews were great and it’s also significantly cheaper than the “real” versions. I’ll report back after I’ve had a chance to use it a bit.
Otherwise, I’ll be ordering another gallon of Pyranha water-based or Absorbine Ultra Shield (black bottle)–they’re the only two fly sprays I’ve found so far that seem to do much at all.
Funny story about the green bottle:
A few years ago I tried it. I had a shedrow barn and my horses had free access to come and go into the stalls for shelter. I used to leave my fly spray hanging by the stall door and no one ever messed with it.
The green Pyranha smells like straight up peppermint. I sprayed the horses with it for the first time in the morning, then went to do whatever I had planned for the day. I came home and the bottle was on the ground, chewed into pieces, and there was a HUGE area licked clean all around. My nose told me my donkey was the guilty culprit, who smelled like a candy cane! She had knocked the bottle down, chewed it open, and lapped up the contents!!!
No donkeys were harmed in the incident. :lol: I still can’t tell you if the stuff actually works.
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@Texarkana :lol: I’m really laughing at this. Not surprising…I bought some Coat Defense powder and paste since we’re dealing with rainrot thanks to the rain/humidity cycle and they both smell like peppermint too. My guy was really offended that I didn’t let him taste the “treats” I brought to just waft around him.
I use the original yellow bottle pyranha but I dilute with apple cider vinegar. Works just as well and easier on the horses coat. I do 2/3 pyrahna and 1/3 ACV. Saves money too as an added bonus! I just got a flyer for spalding labs for fly spray. I’m curious to try it next…
I just bought some and it was definitely blue. I think I got it at Dover? I was a die hard yellow bottle fan, but so far I’m really liking the water based spray better. The oil based really created this scurfy stuff. Have not tried the black bottle. Also haven’t tried the green bottle because my horse has gotten hives from other “natural” repellents in the past.
Psssst…Santa Cruz for shipped fly spray. 
Great pricing, FREE SHIPPING. I place one or two big orders every summer. I’m sure they hate me :lol:
I do not have my sh*t together enough to rely on ordering fly spray! :lol:
Seriously, I have to be able to run to the store and pick it up when I’m getting low. Otherwise, I inevitably miscalculate and run out before it arrives… then I still end up having to run to the store to buy more in the interim.
Same goes for anything consumable!
This is totally why I order four or more gallons at a time :lol: :lol: :lol:
I get my blue bottle from horse.com when they have a free shipping deal, which they do often. I’ll get 2 or 3 gallons at a time and have enough for most of fly & gnat season here.
I used to really like Pyranha. Can’t remember the bottle color; it wasn’t water-based. It was the only spray that worked for more than an hour on my horse in TN. Since moving to FL, I’m using fly predators for house flies. We’d have zero flies if it wasn’t for the hens eating the tiny predators :no: and mixing my own fly spray from concentrate. It keeps the scant deer flies off and the mosquitoes off at night. I don’t know if anything works on trails when swarms of biting flies attack.
Even the Pyranha only works so long here in the deep South; same goes for Ultra Shield. I’m currently using Pro Force but adding a couple of tablespoons of Neem oil concentrate which works well, especially against the infernal gnats. Might even go back to buying the cheap Bronco stuff and just adding Neem oil as that seems to work about as well as anything these days. Tried even mixing my own with essential oils and ACV, but it was Meh.
