Originally Posted by Velksfish
How hard is that??
If you don't want to purchase a RODI
The alternative is to purchase ro
water from a store or water machine .
Mixing the salt is very easy .
You will need either a refractometer or hydrometer , a hydrometer will work but not the most accurate device for measuring .
All I can suggest is price the difference , if you want to go the route like the rest of us and mix your own to physically do it yourself is the easiest way to learn .