Water Hardness Test

I bought an HTH 6 way test kit. On the total hardness test I dropped the 5 drops of hardness indicator into the tube and my sample turned brilliant shade of purple. After about 30 drops of the titrant it never turned back to green. I got online with HTH and fhe rep said maybe I needed to have my water tested at a nearby pool store.

Googling the problem gave me some answers that I may need to add some calcium chloride or Hardness Increaser to the water. I live in a rural area, and our water is already known for being pretty hard so I’m hesitant to start dumping anything to increase that into the water.

Any ideas? Or should I just go ahead and get the water tested and let the pool store sell me some over priced product?