Our pool was installed in late May with DiamondBrite. The finish had "rust" colored streaks throughout. As we test our water weekly and were staying well balanced I cannot blame the water. Contrary to what the pool company keeps telling us the stains are not algae and cannot be rubbed away. The company refuses to refinish the pool instead they have drained our pool twice and acid washed and buffed the finish. Of course this pretty much guarantees the life of the finish will be shortened as it is being worn away. Would love any advice anyone can offer or any similar experiences.