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now you have 35 litres of RO water in there, add 1155 grams of salt, this will give you a reading of approximately 33PPT which is Ideal at the moment, then while the salt is in, leave it to heat up and churn away and it will give the salt a good 12-24 hours to dissolve until you get your next RO top up.
When you get your next lot of RO add 33 grams of salt per litre, and then leave it to get to 25oC and then check with your refractometer.
Remember the refractometer will need calibrating, to do this, place a few drops of RO water on the prism plate and then put the plastic guard over the top and look through the eye piece, then using the screw driver move the blue/white divide up or down until the divide is on the 0 mark.
When you get your next lot of RO add 33 grams of salt per litre, and then leave it to get to 25oC and then check with your refractometer.
Remember the refractometer will need calibrating, to do this, place a few drops of RO water on the prism plate and then put the plastic guard over the top and look through the eye piece, then using the screw driver move the blue/white divide up or down until the divide is on the 0 mark.