Thanks for the link!!
The product at the link you posted, squall, has, as a primary active ingredient, B.t.i.; the same sub-species of organism as Gnatrol. How cool is that???!!!!
My guess is (at this time) there's a major difference in concentration of B.t.i. between the 2 products, as the 'dunks' are designed for a delayed release over a 30-day period, apparently, and the Gnatrol is mixed at less weight per gallon of H2O than the weight of the dunks.
But the purported area covered, per dunk, (100 sq. ft. ,if I recall what I read correctly), also lends itself to some interpretation, too.
I rarely even use bug dope any more (nasty stuff!!), I've never dabbled in 'Dunks' before, never had a mosquito magnet; just cohabitated with the buggers (mosquitos), as 4-5 months of the year they seem to run the place (*I suspect when the legislature adjourns, the mosquitos sit in their chairs and committee rooms, and make grave decisions on the direction Alaska will take, albeit with less detriment; they're -that- prevalent here).
Home Depot prices them in a 2-pack for about $9 (I'm sure it's more up here; freight kills us).
And I suspect these will serve as a solid back-up when I'm in IMMEDIATE need.
Originally Posted by Green Squall
Its a common product you can get at any big box store. It was designed to kill mosquito larvae, but works for gnat/thripe larvae as well and is totally safe.
I basically put one in a bag and crushed it with a hammer, then applied to the medium before watering. I've also used an organic spray with Spinosad in it. Works well for the adults. Good luck.