Silica gel bags, should I get some?
I live on an island, the humidity level here is always between 75% and 100%, all year. I have room dehumidifiers at home, but still I'm usually well above 70. I found strange that stores liek thomann only have humidifiers and not dehumidifiers. However, most new instruments come with a Silica gel bag inside the case, is that worth it? I wonder why they don't sell them separately.
The silica gel bag is a step in the right direction, but they have limited capacity. There is a product (I forget the name or brand right now) that is a mixture of mineral hydrates that is designed to maintain a specific humidity inside your case. I did some reading into the science behind them, and I was impressed with what I saw. Now of course, like any other gizmo, you have to use it properly and thoughtfully, but I would search for the mineral-based device.
If they have limited capacity, maybe I should use two?
Paul - are you thinking about the Boveda humidifiers? I've been using a combo of Boveda and a stretto pack for this winter season and my case has been a solid 40-42% all winter!
I have come to rely on those too-- the 49% flavor. They're pretty good at pushing humidity into the case. I am less sure about how they work at dehumidifying, but it is definitely worth a try.
I'm pretty sure silica gel will absorb any moisture that is present until they are saturated, at which point they stop working. In a humid area like yours, silica gel would probably not last very long at all, not to mention that it isn't possible to precisely control the humidity of your case with silica gel.
What are those minetral salts and where to get them?
Most people use Boveda.
Yes "Boveda" is the word that was not coming to mind earlier.
It shouldn't be too much of a problem if they keep the case closed whenever they aren't putting something in or taking something out of it.