Reading the sticky, I see that you should add borax and acid to bring the PH back inline. Reading another thread, I saw where one of the commercial products now includes boric acid so that the product is PH neutral. I have some boric acid that is sold here as a roach killer. The package says 99% othoboric acid and 1% inert ingredients. I wonder if this would be suitable to mix TMT and add to the pool?
I don't remember the cost of the product, but is sold in a 1lb container as a powder and you sprinkle around areas where insects would be present. I put some inside the walls when my house was being built. It does seem to help control the bugs.