SWG and Limestone Waterfall

[mguzzy]

I have been following this one.. with interest.
-It can't be the salt; as he is still using the pool with salt and just adding bottled chlorine instead-did I read that right?
-It can't be the chlorine has he is adding chlorine via bottle
-so it must be some other chemical process associated with the operation of the SWG that is eroding the limestone.

I think Poolgate might be onto something. SWG's will electrolysize other molecules as well. Or consider this; Limestone easily dissolves even with weak acids. And its a pretty soft porous mineral and easily erodes.. look at the waterfall. I wonder if the edges weren't that rounded when it was first installed. I bet the limestone is changing the chemistry of the pool water on its own. And that chemistry is creating a different by-product when its run through a SWG. We need to run a sample of his pool water through a mass-spec and a chemical-geologist to chime in here

On a side note I am surprised that limestone is used as a construction material like this. I had a friend that got limestone counter tops in their kitchen. They ended up taking them out because they were prone to staining, soft and easily chipped and imagine accidentally spilling vinegar on your kitchen counter top and watching it fizzz... it was not a good match.

 

[dustindb]

I have been following this one.. with interest.
-It can't be the salt; as he is still using the pool with salt and just adding bottled chlorine instead-did I read that right?
-It can't be the chlorine has he is adding chlorine via bottle
-so it must be some other chemical process associated with the operation of the SWG that is eroding the limestone.

When I first bought the house, there was a very low level of salt and I was maintaining with bleach a la tfp. I later added salt, etc.

I will say it requires a lot of MA to keep the ph under 7.8, like 40oz every 6 days. I can’t remember if it took that much while on bleach. I don’t know if that could be a factor.