Hard water question

Hey all I’m new to the forum but not new to glass and bongs as I have quite the collection. However, when I first started smoking I never used distilled water and got some hard water stains in pieces. I have tried CLR, white vinegar and the like and nothing seems to work. My question is if I continue to clean my bongs regularly and get the resin out if the hard water stains can be harmful to my health? I’m really good about cleaning my pieces and I get all the Rez out but I figured I’d ask if anyone knows if having hard water stains is dangerous. I’ll attach a picture of one of my bongs.

in the picture you can see the spots I’ve tried to scrape with a wire brush.

 

Also this one has it the worst out of all my pieces. Please no judgment if this is a stupid question I’ve just always wondered

 

I’m willing to try! Does anyone know if water stains are dangerous? I know drinking hard water isn’t bad for you but inhaling it while smoking is different

 

Apologies for the weird post I have a bit of OCD and my brain obsesses with things. So essentially getting rid of water stains is to make it more visually appealing rather than safe?

 

Also one final question for you awesome folks. Any idea on how to get tiny bits out of perks? Should I let it sit in ISO over night? This is my sextuple honeycomb piece and I can get it spotless but can’t seem to get the little pieces out

 

I even wonder if Coca Cola would help rid these water stains. As mentioned before I’ve tried the CLR, white vinegar. I clean my pieces with 93-99% iso regularly