Does anyone know if the 3" pucks are available in lower percentages than the usual 94%? I bought some standard 3" tabs for use in my fountain and toilet tanks. We were getting these before in 3-packs for ~$12 at the grocery store and I decided they were too expensive so I bought a tub of pool tabs. They are completely overpowering! I didn't realize the ones made for toilet tanks are low-dose. When you flush, the smell permeates the entire house and it's only a matter of time before all the fixtures, etc. rot off, so whenever these current tabs dissolve that's it for indoor use.