We've had an index-type round vinyl frame pool for a good number of years. The current one I believe is 20 x 48. When I was first learning to look after a pool I used the kit religiously to check everything. Over time I have relied a lot more on smell (it doesn't smell right when it is unhealthy), looks and a little walmart two cell pH and FC/CC tester kit and how it responds to what I'm putting in. This summer my husband took over the pool, mainly because he didn't like the way I was clearing up the winter yucks. We now have a nice case of mustard algae and not enough CYA and I don't know how much he put in (he put in some but not enough). Sooo I dragged the kit out, bought a ton of bleach and started scrubbing.

So to my question.
What do I need to replace in this (brilliant btw) kit? What ages and what is still ok? Can I buy the various indicators and reagents separately? Can I buy any of it locally?