I assume it’s right . I never order refills . I just order a new kit every year. Tf-100. I get a new kit because the makings for the amount of water added to beakers always fade away. I wish they didn’t rub off so easilyAre you using the correct indicator solution for that comparator block? Taylor makes 2 different blocks that use different indicators. It's easy to mix them up when ordering refills. Ask me how I know.
I don’t mean to be rude but you lost me. I used the drops for the ph. I definitely didn’t use the drops for the cyaThe "big" comparator with the CYA test in the other tube uses R-0004.
The "small" comparator with the DPD chlorine test in the other tube uses R-0014.
I think what you have in the picture is the small one.