I am guessing "suspended solids" refers to Total Dissolved Solids (TDS). We don't really put much thought in to TDS, I like to paraphrase an old Ron White quote, "It isn’t that the wind is blowing, it’s what the wind is blowing." For us, it isn't that there are solids in the water, it is what the solids are. Most of TDS is made up of salt which is relatively harmless. TDS is a holdover from the days when we couldn't test for calcium or CYA by themselves and you could only say that water got old. Sadly, most pool knowledge around is a holdover from the past.
Glad you found the forum, we hope it helps you keep a great pool going year round. For a test kit, the k-2006 and TF-100 are the best choices largely due to the inclusion of the FAS-DPD chlorine test. That test gives you accurate and precise chlorine measurements that other kits can't come close to. While the k-2006 is a great kit, the TF-100 was tailor made for the pool care techniques taught here. Heck, the guy who designed it ended up buying this site several years ago. So get one of those put on order and read up some in the Pool School if you haven't already (tab at the top of this page). As always we are here to answer questions and help you along as you learn. We all started this TFP thing with either no ideas or bad ideas, so don't be afraid to ask questions!