Can you tell if a liquid is clear or slightly colored?

The TF100 only needs hue color judgment for pH tests IIRC. http://tftestkits.net/splash-page.html Ask the owner at the web site - really good guy.

You might then look into a pH meter.

Can you describe how your color blindness manifests itself? Not all CB traits are the same for all people.

Scott

During start-up PB gave us some test strips, but recommended we invest in a proper test kit.

I can see colors, but not shades. I cannot tell the difference between blue/purple and red/orange. When putting colors on the light in the pool, there is no difference (to me). Clear water and light yellow tinted would look the same. Same thing with light blue/light green/etc. I would only be able to distinguish color changes if the colors were bold or precipitated out of the solution. On test strips that I've seen, the pH ranges from 6.2-8.4....but they are all orange.

I have access to a digital pH meter, but am worried about the other essential tests. Are there any reliable digital meters available on the market?

Digital units I have seen need fairly frequent calibration. Not hard to do but essential.

If you can see a change from green to pink, pink to colorless, and red to blue, you would do well with the TF-100. The OTO chlorine and Phenol Red pH tests won't help you but the digital meter might be ideal for the pH and DPD-FAS tests will tell you your chlorine, both free and combined up to 50 ppm, way more than the OTO test or strips.

Scott