We bought our 5 yr. old home about 3 months ago. Recently, my dh wanted to caulk the area where the tubs meet the tile. I learned on this ng that we should fill the tubs before caulking. We have 3 tubs and 2 hot water heaters. One of the tubs runs off of one hot water heater and the other two off of the other. The problem is that when we drained the water (he used hot water to fill the tubs) there was a very fine brown powder in the entire bottom of two bathtubs (on the same water heater). At first we thought it could be something in the water until we realized that the third tub did not have the powder.
The water heaters are 5 yrs. old and are located in the attic. What is this powder and what should we do about it? We lived in our other house for 13 yrs. and have never had this happen.
Thanks!
Sloan