Sorry about that I went alittle extreme, please don't take it personally, you are correct much easier to use I didn't mention that I run a FOWLR tank, Reef tank you would probably need a refractometer I don't know, I don't plan on ever having one, so I don't know the difference, but I do know that a Hydro is all I need for a FOWLR, as long as it is probably cleaned after each use