Termite Beasts - Will This Work?

I use one bottle (250ml) per 100 liters.   I do not spray or pour "around" the house.  Instead, I pour directly under the house...under the foundation.  My house has a network of perforated pipes built into the foundation for termite treatment.     I pour the mixture into these pipes at two entry points.  I redo this approximately every 5 years (my preferred frequency).  But I think one time it did it after 3 years...right after the BIG flood in 2011/12.   But I do know in the 11 years I've lived in my home I'm applied it 3 times.  In fact, this coming Oct will be the 5 year point since the last application if memory serves me right....not looking at my records (my records are the last bottle I used...I wrote the application date on the bottle...that bottle is out in my utility/storage room).  Still no signs of termites after using this method for 11 years now....since day one the house was built.

Where I say "my preferred frequency" I picked this number because when I did tons of research a decade ago govt and private tests of the termiticide Imidacloprid showed it was effective for 7 or more years even in Australia where Australian termites are some of the toughest of all termites.  So, I gave myself some leeway by planning to use it approx every 5 years except right after the big flood when I had 20 cm of water set around my house for almost a month....I figure the foundation got good and soaked...maybe the termiticide got degraded.

All the homes in my moobaan have this network of perforated pipes built into their foundations....just something the moobaan developer/builder did for all homes.   Now I do the treatment myself but some of my neighbors pay professionals (giggle, giggle) to come do it.  How do these professionals apply it....well, they pour one 250ml bottle into a 100 liter barrel of water and then pump that solution into the network of perforated pipes under the house.  A very quick process....a quick way to make 10K baht.