Build up inside of toliet bowl?
I have a stubborn build up inside our toliet bowl. I'm not sure what it is. I have looked up several different pictures of calcium and other minerals but none really looked like what I have.
It has been there for about 3 months now, we clean the toilet regularly but it still remains. The surface of the toliet is smooth when you touch it. I have tried lime away on it and tried scrubbing it but the stubborn build up/stain remains. I was going to go get some Muriatic Acid but figured I should ask first before I spend more money.
Any suggestions : )