You are right, my island is "Empress Green," mostly serpentine which is significantly less hard than granite. I have Bianco Romano granite on the perimeter counters; no problem with scratching on the Bianco Romano. And no previous problem with the Empress Green in two years of use. For anyone interested, here is the MOH Scale. Serpentine is about a 4.5 on the scale. This is taken from the findstone.com website: MEASUREMENT OF HARDNESS SCALE 10 Diamond 9 Corundum 8 Topaz 7 Quartz (Granite) 6 Feldspar (Granite) 5 Apatite 4 Fluorite 3 Calcite (Most Marbles) 2 Gypsum 1 Talc The objective of the MOH's Scale is to measure stone resistance to hardness. When sediment and grit harder than the surface, they will scratch and harm the stone. For example, a piece of hard plastic is about a 2.0. It will not scratch #3 Calcite (Marble). However, a piece of sand that measures a 6, will scratch #3 Calcite but will not scratch #7 Quartz which is Granite. The harder the stone, the more resistant it is to abrasion. Exterior sediment that is tracked in to buildings approximately measures from 3.0 to 7.0.

Where the problems lie with using a salt system on a pool with the cover is somewhat 2 fold. First as the cover rolls up it brings in salty water ( less than 4,000 ppm salt). Which is not incredibly corrosive by itself, but once it dries on the roller the water goes away it leaves pure salt behind on the roller and mechanism. In less than 2 years we have seen massive corrosion of the aluminum tubes and castings that the cover rolls up onto. Second, since you are increasing the conductivity of the water, and are introducing a low voltage dc current into the water (for chlorine production) it rapidly increases the amount of electrolytic destruction to items that are constantly in contact with the water. These problems are unique to salt pools. I personally like salt systems and deal with many people who can live with the corrosion caused by them to other appliances. However when it comes to an automatic cover, the destruction is incredibly rapid, and expensive to repair. I would estimate that they can easily at $800 a year to repair bills.

Arkansas girl: I was told same thing that it was only fake Soresto collars, so being a fool I listened to my vet and put the collar on my Bichon that I purchased from the vet. I diligently watched for any signs of an allergic reaction and after only 1 week I noted some serousanguinous drainage under my dogs collar. He has thick curley hair so I did not notice he had a severe reaction under his neck. When the vet shaved his neck the entire neck underneath was excoriated and swollen. Now my poor baby is miserable and on antibiotics and antihistamines. His breathing is rapid when he sleeps and I pray there is no internal damage. I immediately took the collars off of both my pets and threw these $160 worth of collars in the garbage. I am going back to vet today because swelling is still bad and my dog’s breathing is rapid when he sleeps. Do not use these if you love your pets. My Bichon had a very severe reaction and I personally wish I had listened to reviews and not Enlanco who I called nor my vet. EPA has multiple reports of deaths and should take these off the market. I am going to do my best to make sure they do!

https://fox17online.com/2019/04/21/experts-warn-michigan-residents-about-spotted-lanternflies/