- Thread starter aasbury
- Start date

So you say you don't want to buy and use bleach, so what exactly are you using right now for chlorination? Is the powder Cal-Hypo or is it Dichlor (or even Trichlor granular)? You want to stay away from Dichlor and Trichlor since your CYA is already so high. As for Cal-Hypo, it will increase Calcium Hardness (CH), but if yours is pretty low, then you could get away with using it for a while. For every 10 ppm FC added by Cal-Hypo, it also increases CH by at least 7 ppm.

JasonLion said:

aasbury said:

When I dilute the sample 50/50 I get 90. Without dilution I get around 100.

For clarification, when you did the dilution method, did you come up with 45 that you multiplied by 2 to get 90? Or did you come up with 90, that needs to be multiplied by 2 to become 180.

I interpreted it as your final number was 90 with one method and 100 with another method. +/- 10 is common with this test, so that could be possible.