Customer called us out for a slow draining shower in master bathroom and low water pressure in the kids bathroom shower. I inspected the master bathroom and saw that the drain had lots of limescale build up. I recommended cleaning it out with a tub gun. Customer agreed. For the kids bathroom shower it appeared to be partially blocked. I recommended removing the head and cleaning out the aerator. Customer agreed. I removed the shower drain cover in the master and scraped the sides of the pipe of all lime scaling. I then ran the tub gun down to clear the remainder of the pipe of any lime scaling. I cleaned up the area and tested for drainage. For the kids bathroom I removed the shower head and cleaned out all the plumbers tape around the aerator. I then retapped the pipe and put the head back on. Tested the head and it worked well.