Water Question

Bob Gagnon plumbing and heating

I recently installed a tank with calcite to maintain proper pH in a house with a well. The customers didn't want to go with a salt tank to correct hardness. The system has worked good for a couple of months but recently had very rusty water and very low pressure for a short while, an hour,  which cleared itself up, any ideas? They also have a small coating of grayish white gel on the bottom of the tea pot, anything to worry about?



Thanks, Bob Gagnon