I assist in running a condominium and we are having trouble with our swimming pool. We have some rust type stains down the middle area of the pool and are looking for some professional help to give us guidance what may be causing this, Can people give recommendations on companies who maybe able to supply help. We already have engaged home and pool but they are not very helpful. The grout was redone about 3-5 years ago, our main concern is why is this looking like rust coming thru. The pool is located on the roof area.