you can still use your htc test kit by dilution testing your water, using source water or bottled to get a chlorine reading, providing you are accurate with your dilution, 1 part pool water to 9 parts source will give you a reading which you can just multiply by 10 - i.e. your 35ppm FC reading would be 3.5ppm.
I know it's not ideal, but the on the other hand, it seems bizarre to me sometimes that you all use so much dropper re-agent when testing, or is that reagent just old coppers in money? I don't know because I use comparator and tablet re-agents.
Regards
Stuart