Make sure you promote them here in your sponsor sub-forum and target them to the shrimp keepers. Seems like you actually take advantage of your forum and could use it to hit those niche markets for newbie shrimp keepers.
Sera kits are going to be a big hit with those who grow tired of API and other less than accurate products on the market. My philosophy: why pay $7-$10 for a GH kit that's nigh impossible to read (API) and whoa inaccurate when you can spend $10 for something you know will work and is used by other experienced hobbyists (Sera)? No-brainer for me.
The large glass test tubes are an added bonus. Anyone who is reading this and plans to jump on the Sera bandwagon - get ready. You are going to be in love with those tubes. Only takes a couple swirls, no shaking, easy to clean, more sturdy. And you can store your reagent bottle inside the tube when not in use.