Well, it could mean you have extremely hard water….
Or it could mean the test chemical is defective.
I have seachem equilibrium on hand so If I had thise results I would get some distilled water and test it with the api test kit, and then I would add a measured amount of equilibrium to give me an expected hardness and then use the api test kit to verify.
ie distilled should change on the first drop.
15 ml of Equilibrium should raise 20 gallons of water 2.8 degrees of hardness.
1.5 ml would raise 2 gallons 2.8 degrees.
1.5 ml would raise 1 gallon 5.6 degrees.
1.5 ml would raise a quart 22.4 degrees…
maybe 1.5 milligrams in a quart of distilled left to fully dissolve and do a 50 % dilution . Ie 1 cup of mixed with 1 cup distilled and mix and take 5 mls of that to do an api drop test to verify test drops are good…
so, I am assuming this is your tap water.. do you have known hard water? Li e deposits on plumbing fixtures? Soap doesnt suds up and hard to rinse off? Shower head needs frequent servicing to clean out to get a decent shower?