Mtc mini-cal http://www.marinetechnical.com/page13.html
jpelzer Apr 6, 2012 #62 Yeah, I have one of those too. Bought years ago off eBay, didn't have any markings, thanks for the link! I drilled mine to add a pH port on top.
Yeah, I have one of those too. Bought years ago off eBay, didn't have any markings, thanks for the link! I drilled mine to add a pH port on top.